Home / 8,742.78-13,117.46-5,235.28

Finding the Fourth Proportional to 8,742.78, 13,117.46 and 5,235.28

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Solution

The fourth proportional to 8,742.78, 13,117.46 and 5,235.28 is: 7,854.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,742.78 : 13,117.46 = 5,235.28 : x
  2. Step 2: Convert to fraction form
    8,742.78/13,117.46 = 5,235.28/x
  3. Step 3: Cross multiply
    8,742.78x = 13,117.46 × 5,235.28
  4. Step 4: Simplify right side
    8,742.78x = 68,673,517.02
  5. Step 5: Solve for x
    x = 68,673,517.02/8,742.78
  6. Step 6: Final answer
    x = 7,854.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.