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Finding the Fourth Proportional to 7,711.50, 10,638.54 and 4,726.20

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Solution

The fourth proportional to 7,711.50, 10,638.54 and 4,726.20 is: 6,520.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,711.50 : 10,638.54 = 4,726.20 : x
  2. Step 2: Convert to fraction form
    7,711.50/10,638.54 = 4,726.20/x
  3. Step 3: Cross multiply
    7,711.50x = 10,638.54 × 4,726.20
  4. Step 4: Simplify right side
    7,711.50x = 50,279,867.75
  5. Step 5: Solve for x
    x = 50,279,867.75/7,711.50
  6. Step 6: Final answer
    x = 6,520.12

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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.