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Finding the Fourth Proportional to 18,909.53, 28,357.92 and 7,060.85

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Solution

The fourth proportional to 18,909.53, 28,357.92 and 7,060.85 is: 10,588.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.53 : 28,357.92 = 7,060.85 : x
  2. Step 2: Convert to fraction form
    18,909.53/28,357.92 = 7,060.85/x
  3. Step 3: Cross multiply
    18,909.53x = 28,357.92 × 7,060.85
  4. Step 4: Simplify right side
    18,909.53x = 200,231,019.43
  5. Step 5: Solve for x
    x = 200,231,019.43/18,909.53
  6. Step 6: Final answer
    x = 10,588.89

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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.