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Finding the Fourth Proportional to 8,656.70, 12,989.10 and 4,501.40

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Solution

The fourth proportional to 8,656.70, 12,989.10 and 4,501.40 is: 6,754.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.70 : 12,989.10 = 4,501.40 : x
  2. Step 2: Convert to fraction form
    8,656.70/12,989.10 = 4,501.40/x
  3. Step 3: Cross multiply
    8,656.70x = 12,989.10 × 4,501.40
  4. Step 4: Simplify right side
    8,656.70x = 58,469,134.74
  5. Step 5: Solve for x
    x = 58,469,134.74/8,656.70
  6. Step 6: Final answer
    x = 6,754.21

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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.