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Finding the Fourth Proportional to 8,751.52, 12,070.92 and 5,212

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Solution

The fourth proportional to 8,751.52, 12,070.92 and 5,212 is: 7,188.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,751.52 : 12,070.92 = 5,212 : x
  2. Step 2: Convert to fraction form
    8,751.52/12,070.92 = 5,212/x
  3. Step 3: Cross multiply
    8,751.52x = 12,070.92 × 5,212
  4. Step 4: Simplify right side
    8,751.52x = 62,913,635.04
  5. Step 5: Solve for x
    x = 62,913,635.04/8,751.52
  6. Step 6: Final answer
    x = 7,188.88

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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.