Home / 20,456.97-28,224.50-12,490.83

Finding the Fourth Proportional to 20,456.97, 28,224.50 and 12,490.83

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Solution

The fourth proportional to 20,456.97, 28,224.50 and 12,490.83 is: 17,233.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.97 : 28,224.50 = 12,490.83 : x
  2. Step 2: Convert to fraction form
    20,456.97/28,224.50 = 12,490.83/x
  3. Step 3: Cross multiply
    20,456.97x = 28,224.50 × 12,490.83
  4. Step 4: Simplify right side
    20,456.97x = 352,547,368.88
  5. Step 5: Solve for x
    x = 352,547,368.88/20,456.97
  6. Step 6: Final answer
    x = 17,233.61

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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.