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Finding the Fourth Proportional to 15,117.78, 20,862.62 and 8,404.04

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Solution

The fourth proportional to 15,117.78, 20,862.62 and 8,404.04 is: 11,597.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.78 : 20,862.62 = 8,404.04 : x
  2. Step 2: Convert to fraction form
    15,117.78/20,862.62 = 8,404.04/x
  3. Step 3: Cross multiply
    15,117.78x = 20,862.62 × 8,404.04
  4. Step 4: Simplify right side
    15,117.78x = 175,330,146.65
  5. Step 5: Solve for x
    x = 175,330,146.65/15,117.78
  6. Step 6: Final answer
    x = 11,597.61

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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.