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Finding the Fourth Proportional to 7,174.48, 9,888.60 and 5,472.40

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Solution

The fourth proportional to 7,174.48, 9,888.60 and 5,472.40 is: 7,542.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,174.48 : 9,888.60 = 5,472.40 : x
  2. Step 2: Convert to fraction form
    7,174.48/9,888.60 = 5,472.40/x
  3. Step 3: Cross multiply
    7,174.48x = 9,888.60 × 5,472.40
  4. Step 4: Simplify right side
    7,174.48x = 54,114,374.64
  5. Step 5: Solve for x
    x = 54,114,374.64/7,174.48
  6. Step 6: Final answer
    x = 7,542.62

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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.