Home / 31,098.24-42,922.20-20,488.80

Finding the Fourth Proportional to 31,098.24, 42,922.20 and 20,488.80

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Solution

The fourth proportional to 31,098.24, 42,922.20 and 20,488.80 is: 28,278.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,098.24 : 42,922.20 = 20,488.80 : x
  2. Step 2: Convert to fraction form
    31,098.24/42,922.20 = 20,488.80/x
  3. Step 3: Cross multiply
    31,098.24x = 42,922.20 × 20,488.80
  4. Step 4: Simplify right side
    31,098.24x = 879,424,371.36
  5. Step 5: Solve for x
    x = 879,424,371.36/31,098.24
  6. Step 6: Final answer
    x = 28,278.91

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.