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Finding the Fourth Proportional to 18,462.42, 25,478.12 and 10,078.92

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Solution

The fourth proportional to 18,462.42, 25,478.12 and 10,078.92 is: 13,908.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,462.42 : 25,478.12 = 10,078.92 : x
  2. Step 2: Convert to fraction form
    18,462.42/25,478.12 = 10,078.92/x
  3. Step 3: Cross multiply
    18,462.42x = 25,478.12 × 10,078.92
  4. Step 4: Simplify right side
    18,462.42x = 256,791,882.84
  5. Step 5: Solve for x
    x = 256,791,882.84/18,462.42
  6. Step 6: Final answer
    x = 13,908.90

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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.