Home / 20,863.98-31,139.24-18,040.32

Finding the Fourth Proportional to 20,863.98, 31,139.24 and 18,040.32

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Solution

The fourth proportional to 20,863.98, 31,139.24 and 18,040.32 is: 26,924.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.98 : 31,139.24 = 18,040.32 : x
  2. Step 2: Convert to fraction form
    20,863.98/31,139.24 = 18,040.32/x
  3. Step 3: Cross multiply
    20,863.98x = 31,139.24 × 18,040.32
  4. Step 4: Simplify right side
    20,863.98x = 561,761,763.96
  5. Step 5: Solve for x
    x = 561,761,763.96/20,863.98
  6. Step 6: Final answer
    x = 26,924.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.