Home / 28,489.78-39,315.13-15,914.53

Finding the Fourth Proportional to 28,489.78, 39,315.13 and 15,914.53

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Solution

The fourth proportional to 28,489.78, 39,315.13 and 15,914.53 is: 21,961.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.78 : 39,315.13 = 15,914.53 : x
  2. Step 2: Convert to fraction form
    28,489.78/39,315.13 = 15,914.53/x
  3. Step 3: Cross multiply
    28,489.78x = 39,315.13 × 15,914.53
  4. Step 4: Simplify right side
    28,489.78x = 625,681,815.84
  5. Step 5: Solve for x
    x = 625,681,815.84/28,489.78
  6. Step 6: Final answer
    x = 21,961.62

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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.