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Finding the Fourth Proportional to 12,729.53, 17,565.54 and 7,351.56

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Solution

The fourth proportional to 12,729.53, 17,565.54 and 7,351.56 is: 10,144.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.53 : 17,565.54 = 7,351.56 : x
  2. Step 2: Convert to fraction form
    12,729.53/17,565.54 = 7,351.56/x
  3. Step 3: Cross multiply
    12,729.53x = 17,565.54 × 7,351.56
  4. Step 4: Simplify right side
    12,729.53x = 129,134,135.03
  5. Step 5: Solve for x
    x = 129,134,135.03/12,729.53
  6. Step 6: Final answer
    x = 10,144.45

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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.