Home / 21,331.27-32,019.45-11,979.28

Finding the Fourth Proportional to 21,331.27, 32,019.45 and 11,979.28

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Solution

The fourth proportional to 21,331.27, 32,019.45 and 11,979.28 is: 17,981.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.27 : 32,019.45 = 11,979.28 : x
  2. Step 2: Convert to fraction form
    21,331.27/32,019.45 = 11,979.28/x
  3. Step 3: Cross multiply
    21,331.27x = 32,019.45 × 11,979.28
  4. Step 4: Simplify right side
    21,331.27x = 383,569,957.00
  5. Step 5: Solve for x
    x = 383,569,957.00/21,331.27
  6. Step 6: Final answer
    x = 17,981.58

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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.