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Finding the Fourth Proportional to 8,631.70, 11,915.76 and 6,508.10

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Solution

The fourth proportional to 8,631.70, 11,915.76 and 6,508.10 is: 8,984.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.70 : 11,915.76 = 6,508.10 : x
  2. Step 2: Convert to fraction form
    8,631.70/11,915.76 = 6,508.10/x
  3. Step 3: Cross multiply
    8,631.70x = 11,915.76 × 6,508.10
  4. Step 4: Simplify right side
    8,631.70x = 77,548,957.66
  5. Step 5: Solve for x
    x = 77,548,957.66/8,631.70
  6. Step 6: Final answer
    x = 8,984.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.