Home / 20,414.86-28,165.25-13,345.38

Finding the Fourth Proportional to 20,414.86, 28,165.25 and 13,345.38

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Solution

The fourth proportional to 20,414.86, 28,165.25 and 13,345.38 is: 18,411.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,414.86 : 28,165.25 = 13,345.38 : x
  2. Step 2: Convert to fraction form
    20,414.86/28,165.25 = 13,345.38/x
  3. Step 3: Cross multiply
    20,414.86x = 28,165.25 × 13,345.38
  4. Step 4: Simplify right side
    20,414.86x = 375,875,997.41
  5. Step 5: Solve for x
    x = 375,875,997.41/20,414.86
  6. Step 6: Final answer
    x = 18,411.88

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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.