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Finding the Fourth Proportional to 38,447.70, 57,671.55 and 20,951.70

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Solution

The fourth proportional to 38,447.70, 57,671.55 and 20,951.70 is: 31,427.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,447.70 : 57,671.55 = 20,951.70 : x
  2. Step 2: Convert to fraction form
    38,447.70/57,671.55 = 20,951.70/x
  3. Step 3: Cross multiply
    38,447.70x = 57,671.55 × 20,951.70
  4. Step 4: Simplify right side
    38,447.70x = 1,208,317,014.14
  5. Step 5: Solve for x
    x = 1,208,317,014.14/38,447.70
  6. Step 6: Final answer
    x = 31,427.55

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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.