Home / 20,356.60-28,088.70-11,860.12

Finding the Fourth Proportional to 20,356.60, 28,088.70 and 11,860.12

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Solution

The fourth proportional to 20,356.60, 28,088.70 and 11,860.12 is: 16,364.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,356.60 : 28,088.70 = 11,860.12 : x
  2. Step 2: Convert to fraction form
    20,356.60/28,088.70 = 11,860.12/x
  3. Step 3: Cross multiply
    20,356.60x = 28,088.70 × 11,860.12
  4. Step 4: Simplify right side
    20,356.60x = 333,135,352.64
  5. Step 5: Solve for x
    x = 333,135,352.64/20,356.60
  6. Step 6: Final answer
    x = 16,364.98

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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.