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Finding the Fourth Proportional to 13,658.72, 20,488.01 and 4,299.53

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Solution

The fourth proportional to 13,658.72, 20,488.01 and 4,299.53 is: 6,449.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,658.72 : 20,488.01 = 4,299.53 : x
  2. Step 2: Convert to fraction form
    13,658.72/20,488.01 = 4,299.53/x
  3. Step 3: Cross multiply
    13,658.72x = 20,488.01 × 4,299.53
  4. Step 4: Simplify right side
    13,658.72x = 88,088,689.70
  5. Step 5: Solve for x
    x = 88,088,689.70/13,658.72
  6. Step 6: Final answer
    x = 6,449.27

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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.