Home / 39,899.97-55,062.11-21,750.60

Finding the Fourth Proportional to 39,899.97, 55,062.11 and 21,750.60

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Solution

The fourth proportional to 39,899.97, 55,062.11 and 21,750.60 is: 30,015.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,899.97 : 55,062.11 = 21,750.60 : x
  2. Step 2: Convert to fraction form
    39,899.97/55,062.11 = 21,750.60/x
  3. Step 3: Cross multiply
    39,899.97x = 55,062.11 × 21,750.60
  4. Step 4: Simplify right side
    39,899.97x = 1,197,633,929.77
  5. Step 5: Solve for x
    x = 1,197,633,929.77/39,899.97
  6. Step 6: Final answer
    x = 30,015.91

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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.