Home / 28,979.70-39,988.65-16,231.11

Finding the Fourth Proportional to 28,979.70, 39,988.65 and 16,231.11

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Solution

The fourth proportional to 28,979.70, 39,988.65 and 16,231.11 is: 22,397.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979.70 : 39,988.65 = 16,231.11 : x
  2. Step 2: Convert to fraction form
    28,979.70/39,988.65 = 16,231.11/x
  3. Step 3: Cross multiply
    28,979.70x = 39,988.65 × 16,231.11
  4. Step 4: Simplify right side
    28,979.70x = 649,060,176.90
  5. Step 5: Solve for x
    x = 649,060,176.90/28,979.70
  6. Step 6: Final answer
    x = 22,397.06

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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.