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Finding the Fourth Proportional to 15,979.29, 22,051.53 and 8,906.17

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Solution

The fourth proportional to 15,979.29, 22,051.53 and 8,906.17 is: 12,290.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,979.29 : 22,051.53 = 8,906.17 : x
  2. Step 2: Convert to fraction form
    15,979.29/22,051.53 = 8,906.17/x
  3. Step 3: Cross multiply
    15,979.29x = 22,051.53 × 8,906.17
  4. Step 4: Simplify right side
    15,979.29x = 196,394,564.68
  5. Step 5: Solve for x
    x = 196,394,564.68/15,979.29
  6. Step 6: Final answer
    x = 12,290.57

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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.