Home / 39,883.27-55,039.28-21,978.92

Finding the Fourth Proportional to 39,883.27, 55,039.28 and 21,978.92

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Solution

The fourth proportional to 39,883.27, 55,039.28 and 21,978.92 is: 30,331.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,883.27 : 55,039.28 = 21,978.92 : x
  2. Step 2: Convert to fraction form
    39,883.27/55,039.28 = 21,978.92/x
  3. Step 3: Cross multiply
    39,883.27x = 55,039.28 × 21,978.92
  4. Step 4: Simplify right side
    39,883.27x = 1,209,703,656.78
  5. Step 5: Solve for x
    x = 1,209,703,656.78/39,883.27
  6. Step 6: Final answer
    x = 30,331.11

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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.