Home / 21,285.75-31,901.19-19,957.12

Finding the Fourth Proportional to 21,285.75, 31,901.19 and 19,957.12

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Solution

The fourth proportional to 21,285.75, 31,901.19 and 19,957.12 is: 29,909.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.75 : 31,901.19 = 19,957.12 : x
  2. Step 2: Convert to fraction form
    21,285.75/31,901.19 = 19,957.12/x
  3. Step 3: Cross multiply
    21,285.75x = 31,901.19 × 19,957.12
  4. Step 4: Simplify right side
    21,285.75x = 636,655,876.97
  5. Step 5: Solve for x
    x = 636,655,876.97/21,285.75
  6. Step 6: Final answer
    x = 29,909.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.