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Finding the Fourth Proportional to 8,687.82, 11,988.90 and 5,148.93

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Solution

The fourth proportional to 8,687.82, 11,988.90 and 5,148.93 is: 7,105.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.82 : 11,988.90 = 5,148.93 : x
  2. Step 2: Convert to fraction form
    8,687.82/11,988.90 = 5,148.93/x
  3. Step 3: Cross multiply
    8,687.82x = 11,988.90 × 5,148.93
  4. Step 4: Simplify right side
    8,687.82x = 61,730,006.88
  5. Step 5: Solve for x
    x = 61,730,006.88/8,687.82
  6. Step 6: Final answer
    x = 7,105.35

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1.5x scale

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.