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Finding the Fourth Proportional to 8,687.52, 13,004.88 and 4,780.08

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Solution

The fourth proportional to 8,687.52, 13,004.88 and 4,780.08 is: 7,155.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.52 : 13,004.88 = 4,780.08 : x
  2. Step 2: Convert to fraction form
    8,687.52/13,004.88 = 4,780.08/x
  3. Step 3: Cross multiply
    8,687.52x = 13,004.88 × 4,780.08
  4. Step 4: Simplify right side
    8,687.52x = 62,164,366.79
  5. Step 5: Solve for x
    x = 62,164,366.79/8,687.52
  6. Step 6: Final answer
    x = 7,155.59

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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.