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Finding the Fourth Proportional to 8,438.74, 12,663.58 and 4,545.88

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Solution

The fourth proportional to 8,438.74, 12,663.58 and 4,545.88 is: 6,821.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.74 : 12,663.58 = 4,545.88 : x
  2. Step 2: Convert to fraction form
    8,438.74/12,663.58 = 4,545.88/x
  3. Step 3: Cross multiply
    8,438.74x = 12,663.58 × 4,545.88
  4. Step 4: Simplify right side
    8,438.74x = 57,567,115.05
  5. Step 5: Solve for x
    x = 57,567,115.05/8,438.74
  6. Step 6: Final answer
    x = 6,821.77

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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.