Home / 28,489.20-39,315.06-15,913.95

Finding the Fourth Proportional to 28,489.20, 39,315.06 and 15,913.95

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Solution

The fourth proportional to 28,489.20, 39,315.06 and 15,913.95 is: 21,961.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.20 : 39,315.06 = 15,913.95 : x
  2. Step 2: Convert to fraction form
    28,489.20/39,315.06 = 15,913.95/x
  3. Step 3: Cross multiply
    28,489.20x = 39,315.06 × 15,913.95
  4. Step 4: Simplify right side
    28,489.20x = 625,657,899.09
  5. Step 5: Solve for x
    x = 625,657,899.09/28,489.20
  6. Step 6: Final answer
    x = 21,961.23

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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.