Home / 39,900.20-55,062.66-21,995.90

Finding the Fourth Proportional to 39,900.20, 55,062.66 and 21,995.90

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Solution

The fourth proportional to 39,900.20, 55,062.66 and 21,995.90 is: 30,354.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,900.20 : 55,062.66 = 21,995.90 : x
  2. Step 2: Convert to fraction form
    39,900.20/55,062.66 = 21,995.90/x
  3. Step 3: Cross multiply
    39,900.20x = 55,062.66 × 21,995.90
  4. Step 4: Simplify right side
    39,900.20x = 1,211,152,487.78
  5. Step 5: Solve for x
    x = 1,211,152,487.78/39,900.20
  6. Step 6: Final answer
    x = 30,354.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.