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Finding the Fourth Proportional to 18,195.90, 25,111.80 and 10,237.65

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Solution

The fourth proportional to 18,195.90, 25,111.80 and 10,237.65 is: 14,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,195.90 : 25,111.80 = 10,237.65 : x
  2. Step 2: Convert to fraction form
    18,195.90/25,111.80 = 10,237.65/x
  3. Step 3: Cross multiply
    18,195.90x = 25,111.80 × 10,237.65
  4. Step 4: Simplify right side
    18,195.90x = 257,085,819.27
  5. Step 5: Solve for x
    x = 257,085,819.27/18,195.90
  6. Step 6: Final answer
    x = 14,128.78

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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.