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Finding the Fourth Proportional to 7,405.70, 11,108.55 and 6,239.30

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Solution

The fourth proportional to 7,405.70, 11,108.55 and 6,239.30 is: 9,358.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,405.70 : 11,108.55 = 6,239.30 : x
  2. Step 2: Convert to fraction form
    7,405.70/11,108.55 = 6,239.30/x
  3. Step 3: Cross multiply
    7,405.70x = 11,108.55 × 6,239.30
  4. Step 4: Simplify right side
    7,405.70x = 69,309,576.02
  5. Step 5: Solve for x
    x = 69,309,576.02/7,405.70
  6. Step 6: Final answer
    x = 9,358.95

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Similar ratio
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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.