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Finding the Fourth Proportional to 41,692.80, 62,590.40 and 20,931.20

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Solution

The fourth proportional to 41,692.80, 62,590.40 and 20,931.20 is: 31,422.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,692.80 : 62,590.40 = 20,931.20 : x
  2. Step 2: Convert to fraction form
    41,692.80/62,590.40 = 20,931.20/x
  3. Step 3: Cross multiply
    41,692.80x = 62,590.40 × 20,931.20
  4. Step 4: Simplify right side
    41,692.80x = 1,310,092,180.48
  5. Step 5: Solve for x
    x = 1,310,092,180.48/41,692.80
  6. Step 6: Final answer
    x = 31,422.50

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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.