Home / 15,115.50-20,864.55-9,377.34

Finding the Fourth Proportional to 15,115.50, 20,864.55 and 9,377.34

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Solution

The fourth proportional to 15,115.50, 20,864.55 and 9,377.34 is: 12,943.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.50 : 20,864.55 = 9,377.34 : x
  2. Step 2: Convert to fraction form
    15,115.50/20,864.55 = 9,377.34/x
  3. Step 3: Cross multiply
    15,115.50x = 20,864.55 × 9,377.34
  4. Step 4: Simplify right side
    15,115.50x = 195,653,979.30
  5. Step 5: Solve for x
    x = 195,653,979.30/15,115.50
  6. Step 6: Final answer
    x = 12,943.93

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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.