Home / 39,864.12-55,012.23-21,958.71

Finding the Fourth Proportional to 39,864.12, 55,012.23 and 21,958.71

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Solution

The fourth proportional to 39,864.12, 55,012.23 and 21,958.71 is: 30,302.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,864.12 : 55,012.23 = 21,958.71 : x
  2. Step 2: Convert to fraction form
    39,864.12/55,012.23 = 21,958.71/x
  3. Step 3: Cross multiply
    39,864.12x = 55,012.23 × 21,958.71
  4. Step 4: Simplify right side
    39,864.12x = 1,207,997,605.02
  5. Step 5: Solve for x
    x = 1,207,997,605.02/39,864.12
  6. Step 6: Final answer
    x = 30,302.88

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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.