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Finding the Fourth Proportional to 8,686.92, 13,031.64 and 4,988.52

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Solution

The fourth proportional to 8,686.92, 13,031.64 and 4,988.52 is: 7,483.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.92 : 13,031.64 = 4,988.52 : x
  2. Step 2: Convert to fraction form
    8,686.92/13,031.64 = 4,988.52/x
  3. Step 3: Cross multiply
    8,686.92x = 13,031.64 × 4,988.52
  4. Step 4: Simplify right side
    8,686.92x = 65,008,596.77
  5. Step 5: Solve for x
    x = 65,008,596.77/8,686.92
  6. Step 6: Final answer
    x = 7,483.50

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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.