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Finding the Fourth Proportional to 15,118.92, 20,863.60 and 8,404.40

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Solution

The fourth proportional to 15,118.92, 20,863.60 and 8,404.40 is: 11,597.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.92 : 20,863.60 = 8,404.40 : x
  2. Step 2: Convert to fraction form
    15,118.92/20,863.60 = 8,404.40/x
  3. Step 3: Cross multiply
    15,118.92x = 20,863.60 × 8,404.40
  4. Step 4: Simplify right side
    15,118.92x = 175,346,172.56
  5. Step 5: Solve for x
    x = 175,346,172.56/15,118.92
  6. Step 6: Final answer
    x = 11,597.80

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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.