Home / 39,882.98-55,039.50-21,979.96

Finding the Fourth Proportional to 39,882.98, 55,039.50 and 21,979.96

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Solution

The fourth proportional to 39,882.98, 55,039.50 and 21,979.96 is: 30,332.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,882.98 : 55,039.50 = 21,979.96 : x
  2. Step 2: Convert to fraction form
    39,882.98/55,039.50 = 21,979.96/x
  3. Step 3: Cross multiply
    39,882.98x = 55,039.50 × 21,979.96
  4. Step 4: Simplify right side
    39,882.98x = 1,209,765,870.82
  5. Step 5: Solve for x
    x = 1,209,765,870.82/39,882.98
  6. Step 6: Final answer
    x = 30,332.88

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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.