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Finding the Fourth Proportional to 39,149.80, 58,728.30 and 11,069.80

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Solution

The fourth proportional to 39,149.80, 58,728.30 and 11,069.80 is: 16,605.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,149.80 : 58,728.30 = 11,069.80 : x
  2. Step 2: Convert to fraction form
    39,149.80/58,728.30 = 11,069.80/x
  3. Step 3: Cross multiply
    39,149.80x = 58,728.30 × 11,069.80
  4. Step 4: Simplify right side
    39,149.80x = 650,110,535.34
  5. Step 5: Solve for x
    x = 650,110,535.34/39,149.80
  6. Step 6: Final answer
    x = 16,605.72

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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.