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Finding the Fourth Proportional to 15,981.80, 22,055 and 8,908.32

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Solution

The fourth proportional to 15,981.80, 22,055 and 8,908.32 is: 12,293.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,981.80 : 22,055 = 8,908.32 : x
  2. Step 2: Convert to fraction form
    15,981.80/22,055 = 8,908.32/x
  3. Step 3: Cross multiply
    15,981.80x = 22,055 × 8,908.32
  4. Step 4: Simplify right side
    15,981.80x = 196,472,997.60
  5. Step 5: Solve for x
    x = 196,472,997.60/15,981.80
  6. Step 6: Final answer
    x = 12,293.55

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Double scale
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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.