Home / 8,487.20-12,730.52-3,489.40

Finding the Fourth Proportional to 8,487.20, 12,730.52 and 3,489.40

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Solution

The fourth proportional to 8,487.20, 12,730.52 and 3,489.40 is: 5,233.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.20 : 12,730.52 = 3,489.40 : x
  2. Step 2: Convert to fraction form
    8,487.20/12,730.52 = 3,489.40/x
  3. Step 3: Cross multiply
    8,487.20x = 12,730.52 × 3,489.40
  4. Step 4: Simplify right side
    8,487.20x = 44,421,876.49
  5. Step 5: Solve for x
    x = 44,421,876.49/8,487.20
  6. Step 6: Final answer
    x = 5,233.98

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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.