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Finding the Fourth Proportional to 15,981.92, 22,055.15 and 8,908.79

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Solution

The fourth proportional to 15,981.92, 22,055.15 and 8,908.79 is: 12,294.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,981.92 : 22,055.15 = 8,908.79 : x
  2. Step 2: Convert to fraction form
    15,981.92/22,055.15 = 8,908.79/x
  3. Step 3: Cross multiply
    15,981.92x = 22,055.15 × 8,908.79
  4. Step 4: Simplify right side
    15,981.92x = 196,484,544.95
  5. Step 5: Solve for x
    x = 196,484,544.95/15,981.92
  6. Step 6: Final answer
    x = 12,294.18

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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.