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Finding the Fourth Proportional to 8,572.87, 12,852.38 and 7,880.89

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Solution

The fourth proportional to 8,572.87, 12,852.38 and 7,880.89 is: 11,814.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,572.87 : 12,852.38 = 7,880.89 : x
  2. Step 2: Convert to fraction form
    8,572.87/12,852.38 = 7,880.89/x
  3. Step 3: Cross multiply
    8,572.87x = 12,852.38 × 7,880.89
  4. Step 4: Simplify right side
    8,572.87x = 101,288,186.61
  5. Step 5: Solve for x
    x = 101,288,186.61/8,572.87
  6. Step 6: Final answer
    x = 11,814.97

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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.