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Finding the Fourth Proportional to 39,952.80, 59,920.80 and 20,212.80

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Solution

The fourth proportional to 39,952.80, 59,920.80 and 20,212.80 is: 30,314.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,952.80 : 59,920.80 = 20,212.80 : x
  2. Step 2: Convert to fraction form
    39,952.80/59,920.80 = 20,212.80/x
  3. Step 3: Cross multiply
    39,952.80x = 59,920.80 × 20,212.80
  4. Step 4: Simplify right side
    39,952.80x = 1,211,167,146.24
  5. Step 5: Solve for x
    x = 1,211,167,146.24/39,952.80
  6. Step 6: Final answer
    x = 30,314.95

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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.