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Finding the Fourth Proportional to 38,480.80, 57,692.40 and 20,970.40

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Solution

The fourth proportional to 38,480.80, 57,692.40 and 20,970.40 is: 31,439.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,480.80 : 57,692.40 = 20,970.40 : x
  2. Step 2: Convert to fraction form
    38,480.80/57,692.40 = 20,970.40/x
  3. Step 3: Cross multiply
    38,480.80x = 57,692.40 × 20,970.40
  4. Step 4: Simplify right side
    38,480.80x = 1,209,832,704.96
  5. Step 5: Solve for x
    x = 1,209,832,704.96/38,480.80
  6. Step 6: Final answer
    x = 31,439.91

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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.