Home / 15,131.31-22,686.71-7,729.68

Finding the Fourth Proportional to 15,131.31, 22,686.71 and 7,729.68

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Solution

The fourth proportional to 15,131.31, 22,686.71 and 7,729.68 is: 11,589.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.31 : 22,686.71 = 7,729.68 : x
  2. Step 2: Convert to fraction form
    15,131.31/22,686.71 = 7,729.68/x
  3. Step 3: Cross multiply
    15,131.31x = 22,686.71 × 7,729.68
  4. Step 4: Simplify right side
    15,131.31x = 175,360,949.11
  5. Step 5: Solve for x
    x = 175,360,949.11/15,131.31
  6. Step 6: Final answer
    x = 11,589.28

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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.