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Finding the Fourth Proportional to 18,627.71, 25,706.09 and 11,079.79

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Solution

The fourth proportional to 18,627.71, 25,706.09 and 11,079.79 is: 15,290.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,627.71 : 25,706.09 = 11,079.79 : x
  2. Step 2: Convert to fraction form
    18,627.71/25,706.09 = 11,079.79/x
  3. Step 3: Cross multiply
    18,627.71x = 25,706.09 × 11,079.79
  4. Step 4: Simplify right side
    18,627.71x = 284,818,042.36
  5. Step 5: Solve for x
    x = 284,818,042.36/18,627.71
  6. Step 6: Final answer
    x = 15,290.02

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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.