Home / 28,193,313.60-42,289,970.40-21,018,860.10

Finding the Fourth Proportional to 28,193,313.60, 42,289,970.40 and 21,018,860.10

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Solution

The fourth proportional to 28,193,313.60, 42,289,970.40 and 21,018,860.10 is: 31,528,290.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193,313.60 : 42,289,970.40 = 21,018,860.10 : x
  2. Step 2: Convert to fraction form
    28,193,313.60/42,289,970.40 = 21,018,860.10/x
  3. Step 3: Cross multiply
    28,193,313.60x = 42,289,970.40 × 21,018,860.10
  4. Step 4: Simplify right side
    28,193,313.60x = 888,886,971,470,741.12
  5. Step 5: Solve for x
    x = 888,886,971,470,741.12/28,193,313.60
  6. Step 6: Final answer
    x = 31,528,290.15

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.