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Finding the Fourth Proportional to 18,774.52, 25,909.02 and 10,391

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Solution

The fourth proportional to 18,774.52, 25,909.02 and 10,391 is: 14,339.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.52 : 25,909.02 = 10,391 : x
  2. Step 2: Convert to fraction form
    18,774.52/25,909.02 = 10,391/x
  3. Step 3: Cross multiply
    18,774.52x = 25,909.02 × 10,391
  4. Step 4: Simplify right side
    18,774.52x = 269,220,626.82
  5. Step 5: Solve for x
    x = 269,220,626.82/18,774.52
  6. Step 6: Final answer
    x = 14,339.68

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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.