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Finding the Fourth Proportional to 18,295.61, 25,247.97 and 9,912.11

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Solution

The fourth proportional to 18,295.61, 25,247.97 and 9,912.11 is: 13,678.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,295.61 : 25,247.97 = 9,912.11 : x
  2. Step 2: Convert to fraction form
    18,295.61/25,247.97 = 9,912.11/x
  3. Step 3: Cross multiply
    18,295.61x = 25,247.97 × 9,912.11
  4. Step 4: Simplify right side
    18,295.61x = 250,260,655.92
  5. Step 5: Solve for x
    x = 250,260,655.92/18,295.61
  6. Step 6: Final answer
    x = 13,678.73

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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.