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Finding the Fourth Proportional to 10,342.80, 15,489.90 and 10,342.80

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Solution

The fourth proportional to 10,342.80, 15,489.90 and 10,342.80 is: 15,489.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,342.80 : 15,489.90 = 10,342.80 : x
  2. Step 2: Convert to fraction form
    10,342.80/15,489.90 = 10,342.80/x
  3. Step 3: Cross multiply
    10,342.80x = 15,489.90 × 10,342.80
  4. Step 4: Simplify right side
    10,342.80x = 160,208,937.72
  5. Step 5: Solve for x
    x = 160,208,937.72/10,342.80
  6. Step 6: Final answer
    x = 15,489.90

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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.