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Finding the Fourth Proportional to 18,774.92, 25,881.78 and 14,290.87

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Solution

The fourth proportional to 18,774.92, 25,881.78 and 14,290.87 is: 19,700.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.92 : 25,881.78 = 14,290.87 : x
  2. Step 2: Convert to fraction form
    18,774.92/25,881.78 = 14,290.87/x
  3. Step 3: Cross multiply
    18,774.92x = 25,881.78 × 14,290.87
  4. Step 4: Simplify right side
    18,774.92x = 369,873,023.94
  5. Step 5: Solve for x
    x = 369,873,023.94/18,774.92
  6. Step 6: Final answer
    x = 19,700.38

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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.