Home / 39,901.78-55,064.10-21,996.46

Finding the Fourth Proportional to 39,901.78, 55,064.10 and 21,996.46

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Solution

The fourth proportional to 39,901.78, 55,064.10 and 21,996.46 is: 30,354.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,901.78 : 55,064.10 = 21,996.46 : x
  2. Step 2: Convert to fraction form
    39,901.78/55,064.10 = 21,996.46/x
  3. Step 3: Cross multiply
    39,901.78x = 55,064.10 × 21,996.46
  4. Step 4: Simplify right side
    39,901.78x = 1,211,215,273.09
  5. Step 5: Solve for x
    x = 1,211,215,273.09/39,901.78
  6. Step 6: Final answer
    x = 30,354.92

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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.