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Finding the Fourth Proportional to 38,641.50, 57,940.92 and 11,980.11

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Solution

The fourth proportional to 38,641.50, 57,940.92 and 11,980.11 is: 17,963.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,641.50 : 57,940.92 = 11,980.11 : x
  2. Step 2: Convert to fraction form
    38,641.50/57,940.92 = 11,980.11/x
  3. Step 3: Cross multiply
    38,641.50x = 57,940.92 × 11,980.11
  4. Step 4: Simplify right side
    38,641.50x = 694,138,595.10
  5. Step 5: Solve for x
    x = 694,138,595.10/38,641.50
  6. Step 6: Final answer
    x = 17,963.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.