Home / 9,129.71-13,687.40-3,860.42

Finding the Fourth Proportional to 9,129.71, 13,687.40 and 3,860.42

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Solution

The fourth proportional to 9,129.71, 13,687.40 and 3,860.42 is: 5,787.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.71 : 13,687.40 = 3,860.42 : x
  2. Step 2: Convert to fraction form
    9,129.71/13,687.40 = 3,860.42/x
  3. Step 3: Cross multiply
    9,129.71x = 13,687.40 × 3,860.42
  4. Step 4: Simplify right side
    9,129.71x = 52,839,053.92
  5. Step 5: Solve for x
    x = 52,839,053.92/9,129.71
  6. Step 6: Final answer
    x = 5,787.59

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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.