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Finding the Fourth Proportional to 18,774.92, 25,909.65 and 10,391.42

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Solution

The fourth proportional to 18,774.92, 25,909.65 and 10,391.42 is: 14,340.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.92 : 25,909.65 = 10,391.42 : x
  2. Step 2: Convert to fraction form
    18,774.92/25,909.65 = 10,391.42/x
  3. Step 3: Cross multiply
    18,774.92x = 25,909.65 × 10,391.42
  4. Step 4: Simplify right side
    18,774.92x = 269,237,925.65
  5. Step 5: Solve for x
    x = 269,237,925.65/18,774.92
  6. Step 6: Final answer
    x = 14,340.30

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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.