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Finding the Fourth Proportional to 10,660.80, 14,704.80 and 6,679.20

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Solution

The fourth proportional to 10,660.80, 14,704.80 and 6,679.20 is: 9,212.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,660.80 : 14,704.80 = 6,679.20 : x
  2. Step 2: Convert to fraction form
    10,660.80/14,704.80 = 6,679.20/x
  3. Step 3: Cross multiply
    10,660.80x = 14,704.80 × 6,679.20
  4. Step 4: Simplify right side
    10,660.80x = 98,216,300.16
  5. Step 5: Solve for x
    x = 98,216,300.16/10,660.80
  6. Step 6: Final answer
    x = 9,212.85

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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.