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Finding the Fourth Proportional to 38,480.40, 57,672.42 and 20,667.29

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Solution

The fourth proportional to 38,480.40, 57,672.42 and 20,667.29 is: 30,975.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,480.40 : 57,672.42 = 20,667.29 : x
  2. Step 2: Convert to fraction form
    38,480.40/57,672.42 = 20,667.29/x
  3. Step 3: Cross multiply
    38,480.40x = 57,672.42 × 20,667.29
  4. Step 4: Simplify right side
    38,480.40x = 1,191,932,263.28
  5. Step 5: Solve for x
    x = 1,191,932,263.28/38,480.40
  6. Step 6: Final answer
    x = 30,975.05

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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.