Home / 15,020.86-20,728.46-8,306.76

Finding the Fourth Proportional to 15,020.86, 20,728.46 and 8,306.76

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Solution

The fourth proportional to 15,020.86, 20,728.46 and 8,306.76 is: 11,463.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,020.86 : 20,728.46 = 8,306.76 : x
  2. Step 2: Convert to fraction form
    15,020.86/20,728.46 = 8,306.76/x
  3. Step 3: Cross multiply
    15,020.86x = 20,728.46 × 8,306.76
  4. Step 4: Simplify right side
    15,020.86x = 172,186,342.39
  5. Step 5: Solve for x
    x = 172,186,342.39/15,020.86
  6. Step 6: Final answer
    x = 11,463.15

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Double scale
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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.