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Finding the Fourth Proportional to 7,049.88, 9,729.86 and 4,065.12

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Solution

The fourth proportional to 7,049.88, 9,729.86 and 4,065.12 is: 5,610.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,049.88 : 9,729.86 = 4,065.12 : x
  2. Step 2: Convert to fraction form
    7,049.88/9,729.86 = 4,065.12/x
  3. Step 3: Cross multiply
    7,049.88x = 9,729.86 × 4,065.12
  4. Step 4: Simplify right side
    7,049.88x = 39,553,028.16
  5. Step 5: Solve for x
    x = 39,553,028.16/7,049.88
  6. Step 6: Final answer
    x = 5,610.45

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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.