Home / 28,981.13-39,993.95-16,405.88

Finding the Fourth Proportional to 28,981.13, 39,993.95 and 16,405.88

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Solution

The fourth proportional to 28,981.13, 39,993.95 and 16,405.88 is: 22,640.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,981.13 : 39,993.95 = 16,405.88 : x
  2. Step 2: Convert to fraction form
    28,981.13/39,993.95 = 16,405.88/x
  3. Step 3: Cross multiply
    28,981.13x = 39,993.95 × 16,405.88
  4. Step 4: Simplify right side
    28,981.13x = 656,135,785.47
  5. Step 5: Solve for x
    x = 656,135,785.47/28,981.13
  6. Step 6: Final answer
    x = 22,640.11

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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.