Home / 20,718.27-28,591.77-11,765.20

Finding the Fourth Proportional to 20,718.27, 28,591.77 and 11,765.20

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Solution

The fourth proportional to 20,718.27, 28,591.77 and 11,765.20 is: 16,236.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.27 : 28,591.77 = 11,765.20 : x
  2. Step 2: Convert to fraction form
    20,718.27/28,591.77 = 11,765.20/x
  3. Step 3: Cross multiply
    20,718.27x = 28,591.77 × 11,765.20
  4. Step 4: Simplify right side
    20,718.27x = 336,387,892.40
  5. Step 5: Solve for x
    x = 336,387,892.40/20,718.27
  6. Step 6: Final answer
    x = 16,236.29

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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.