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Finding the Fourth Proportional to 18,614.82, 25,687.74 and 10,657.78

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Solution

The fourth proportional to 18,614.82, 25,687.74 and 10,657.78 is: 14,707.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,614.82 : 25,687.74 = 10,657.78 : x
  2. Step 2: Convert to fraction form
    18,614.82/25,687.74 = 10,657.78/x
  3. Step 3: Cross multiply
    18,614.82x = 25,687.74 × 10,657.78
  4. Step 4: Simplify right side
    18,614.82x = 273,774,281.62
  5. Step 5: Solve for x
    x = 273,774,281.62/18,614.82
  6. Step 6: Final answer
    x = 14,707.33

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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.