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Finding the Fourth Proportional to 39,906.40, 59,830.80 and 16,520.80

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Solution

The fourth proportional to 39,906.40, 59,830.80 and 16,520.80 is: 24,769.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,906.40 : 59,830.80 = 16,520.80 : x
  2. Step 2: Convert to fraction form
    39,906.40/59,830.80 = 16,520.80/x
  3. Step 3: Cross multiply
    39,906.40x = 59,830.80 × 16,520.80
  4. Step 4: Simplify right side
    39,906.40x = 988,452,680.64
  5. Step 5: Solve for x
    x = 988,452,680.64/39,906.40
  6. Step 6: Final answer
    x = 24,769.28

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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.