Home / 8,729.12-12,046.68-5,145.28

Finding the Fourth Proportional to 8,729.12, 12,046.68 and 5,145.28

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Solution

The fourth proportional to 8,729.12, 12,046.68 and 5,145.28 is: 7,100.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,729.12 : 12,046.68 = 5,145.28 : x
  2. Step 2: Convert to fraction form
    8,729.12/12,046.68 = 5,145.28/x
  3. Step 3: Cross multiply
    8,729.12x = 12,046.68 × 5,145.28
  4. Step 4: Simplify right side
    8,729.12x = 61,983,541.67
  5. Step 5: Solve for x
    x = 61,983,541.67/8,729.12
  6. Step 6: Final answer
    x = 7,100.78

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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.