Home / 28,781.28-39,721.80-16,206

Finding the Fourth Proportional to 28,781.28, 39,721.80 and 16,206

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Solution

The fourth proportional to 28,781.28, 39,721.80 and 16,206 is: 22,366.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.28 : 39,721.80 = 16,206 : x
  2. Step 2: Convert to fraction form
    28,781.28/39,721.80 = 16,206/x
  3. Step 3: Cross multiply
    28,781.28x = 39,721.80 × 16,206
  4. Step 4: Simplify right side
    28,781.28x = 643,731,490.80
  5. Step 5: Solve for x
    x = 643,731,490.80/28,781.28
  6. Step 6: Final answer
    x = 22,366.33

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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.