Home / 7,724.38-11,487.20-7,478.34

Finding the Fourth Proportional to 7,724.38, 11,487.20 and 7,478.34

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Solution

The fourth proportional to 7,724.38, 11,487.20 and 7,478.34 is: 11,121.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,724.38 : 11,487.20 = 7,478.34 : x
  2. Step 2: Convert to fraction form
    7,724.38/11,487.20 = 7,478.34/x
  3. Step 3: Cross multiply
    7,724.38x = 11,487.20 × 7,478.34
  4. Step 4: Simplify right side
    7,724.38x = 85,905,092.42
  5. Step 5: Solve for x
    x = 85,905,092.42/7,724.38
  6. Step 6: Final answer
    x = 11,121.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.