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Finding the Fourth Proportional to 20,808.69, 28,721.07 and 17,446.17

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Solution

The fourth proportional to 20,808.69, 28,721.07 and 17,446.17 is: 24,079.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.69 : 28,721.07 = 17,446.17 : x
  2. Step 2: Convert to fraction form
    20,808.69/28,721.07 = 17,446.17/x
  3. Step 3: Cross multiply
    20,808.69x = 28,721.07 × 17,446.17
  4. Step 4: Simplify right side
    20,808.69x = 501,072,669.80
  5. Step 5: Solve for x
    x = 501,072,669.80/20,808.69
  6. Step 6: Final answer
    x = 24,079.97

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1.5x scale

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.