Home / 20,581.18-28,402.16-11,149.74

Finding the Fourth Proportional to 20,581.18, 28,402.16 and 11,149.74

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Solution

The fourth proportional to 20,581.18, 28,402.16 and 11,149.74 is: 15,386.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.18 : 28,402.16 = 11,149.74 : x
  2. Step 2: Convert to fraction form
    20,581.18/28,402.16 = 11,149.74/x
  3. Step 3: Cross multiply
    20,581.18x = 28,402.16 × 11,149.74
  4. Step 4: Simplify right side
    20,581.18x = 316,676,699.44
  5. Step 5: Solve for x
    x = 316,676,699.44/20,581.18
  6. Step 6: Final answer
    x = 15,386.71

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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.