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Finding the Fourth Proportional to 15,002.90, 20,704.05 and 8,288.90

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Solution

The fourth proportional to 15,002.90, 20,704.05 and 8,288.90 is: 11,438.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,002.90 : 20,704.05 = 8,288.90 : x
  2. Step 2: Convert to fraction form
    15,002.90/20,704.05 = 8,288.90/x
  3. Step 3: Cross multiply
    15,002.90x = 20,704.05 × 8,288.90
  4. Step 4: Simplify right side
    15,002.90x = 171,613,800.05
  5. Step 5: Solve for x
    x = 171,613,800.05/15,002.90
  6. Step 6: Final answer
    x = 11,438.71

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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.