Home / 20,654.20-28,502.44-11,222.70

Finding the Fourth Proportional to 20,654.20, 28,502.44 and 11,222.70

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Solution

The fourth proportional to 20,654.20, 28,502.44 and 11,222.70 is: 15,487.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,654.20 : 28,502.44 = 11,222.70 : x
  2. Step 2: Convert to fraction form
    20,654.20/28,502.44 = 11,222.70/x
  3. Step 3: Cross multiply
    20,654.20x = 28,502.44 × 11,222.70
  4. Step 4: Simplify right side
    20,654.20x = 319,874,333.39
  5. Step 5: Solve for x
    x = 319,874,333.39/20,654.20
  6. Step 6: Final answer
    x = 15,487.13

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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.