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Finding the Fourth Proportional to 15,186.87, 20,959.02 and 8,815.14

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Solution

The fourth proportional to 15,186.87, 20,959.02 and 8,815.14 is: 12,165.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,186.87 : 20,959.02 = 8,815.14 : x
  2. Step 2: Convert to fraction form
    15,186.87/20,959.02 = 8,815.14/x
  3. Step 3: Cross multiply
    15,186.87x = 20,959.02 × 8,815.14
  4. Step 4: Simplify right side
    15,186.87x = 184,756,695.56
  5. Step 5: Solve for x
    x = 184,756,695.56/15,186.87
  6. Step 6: Final answer
    x = 12,165.55

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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.