Home / 31,676.11-43,693.98-20,921.08

Finding the Fourth Proportional to 31,676.11, 43,693.98 and 20,921.08

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Solution

The fourth proportional to 31,676.11, 43,693.98 and 20,921.08 is: 28,858.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,676.11 : 43,693.98 = 20,921.08 : x
  2. Step 2: Convert to fraction form
    31,676.11/43,693.98 = 20,921.08/x
  3. Step 3: Cross multiply
    31,676.11x = 43,693.98 × 20,921.08
  4. Step 4: Simplify right side
    31,676.11x = 914,125,251.10
  5. Step 5: Solve for x
    x = 914,125,251.10/31,676.11
  6. Step 6: Final answer
    x = 28,858.51

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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.