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Finding the Fourth Proportional to 15,157.62, 20,914.47 and 8,868.78

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Solution

The fourth proportional to 15,157.62, 20,914.47 and 8,868.78 is: 12,237.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.62 : 20,914.47 = 8,868.78 : x
  2. Step 2: Convert to fraction form
    15,157.62/20,914.47 = 8,868.78/x
  3. Step 3: Cross multiply
    15,157.62x = 20,914.47 × 8,868.78
  4. Step 4: Simplify right side
    15,157.62x = 185,485,833.25
  5. Step 5: Solve for x
    x = 185,485,833.25/15,157.62
  6. Step 6: Final answer
    x = 12,237.13

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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.