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Finding the Fourth Proportional to 8,640.50, 12,971.64 and 7,350.17

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Solution

The fourth proportional to 8,640.50, 12,971.64 and 7,350.17 is: 11,034.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.50 : 12,971.64 = 7,350.17 : x
  2. Step 2: Convert to fraction form
    8,640.50/12,971.64 = 7,350.17/x
  3. Step 3: Cross multiply
    8,640.50x = 12,971.64 × 7,350.17
  4. Step 4: Simplify right side
    8,640.50x = 95,343,759.18
  5. Step 5: Solve for x
    x = 95,343,759.18/8,640.50
  6. Step 6: Final answer
    x = 11,034.52

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1.5x scale

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.