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Finding the Fourth Proportional to 8,658.55, 12,978.51 and 3,730.51

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Solution

The fourth proportional to 8,658.55, 12,978.51 and 3,730.51 is: 5,591.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.55 : 12,978.51 = 3,730.51 : x
  2. Step 2: Convert to fraction form
    8,658.55/12,978.51 = 3,730.51/x
  3. Step 3: Cross multiply
    8,658.55x = 12,978.51 × 3,730.51
  4. Step 4: Simplify right side
    8,658.55x = 48,416,461.34
  5. Step 5: Solve for x
    x = 48,416,461.34/8,658.55
  6. Step 6: Final answer
    x = 5,591.75

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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.