Home / 20,287.95-28,018.76-15,525.15

Finding the Fourth Proportional to 20,287.95, 28,018.76 and 15,525.15

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Solution

The fourth proportional to 20,287.95, 28,018.76 and 15,525.15 is: 21,441.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.95 : 28,018.76 = 15,525.15 : x
  2. Step 2: Convert to fraction form
    20,287.95/28,018.76 = 15,525.15/x
  3. Step 3: Cross multiply
    20,287.95x = 28,018.76 × 15,525.15
  4. Step 4: Simplify right side
    20,287.95x = 434,995,374.19
  5. Step 5: Solve for x
    x = 434,995,374.19/20,287.95
  6. Step 6: Final answer
    x = 21,441.07

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.