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Finding the Fourth Proportional to 15,191.52, 20,993.28 and 10,956.48

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Solution

The fourth proportional to 15,191.52, 20,993.28 and 10,956.48 is: 15,140.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.52 : 20,993.28 = 10,956.48 : x
  2. Step 2: Convert to fraction form
    15,191.52/20,993.28 = 10,956.48/x
  3. Step 3: Cross multiply
    15,191.52x = 20,993.28 × 10,956.48
  4. Step 4: Simplify right side
    15,191.52x = 230,012,452.45
  5. Step 5: Solve for x
    x = 230,012,452.45/15,191.52
  6. Step 6: Final answer
    x = 15,140.85

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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.