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Finding the Fourth Proportional to 7,391.80, 11,080.20 and 6,312.88

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Solution

The fourth proportional to 7,391.80, 11,080.20 and 6,312.88 is: 9,462.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,391.80 : 11,080.20 = 6,312.88 : x
  2. Step 2: Convert to fraction form
    7,391.80/11,080.20 = 6,312.88/x
  3. Step 3: Cross multiply
    7,391.80x = 11,080.20 × 6,312.88
  4. Step 4: Simplify right side
    7,391.80x = 69,947,972.98
  5. Step 5: Solve for x
    x = 69,947,972.98/7,391.80
  6. Step 6: Final answer
    x = 9,462.91

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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.