Home / 20,690.24-31,017.78-9,441.54

Finding the Fourth Proportional to 20,690.24, 31,017.78 and 9,441.54

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Solution

The fourth proportional to 20,690.24, 31,017.78 and 9,441.54 is: 14,154.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.24 : 31,017.78 = 9,441.54 : x
  2. Step 2: Convert to fraction form
    20,690.24/31,017.78 = 9,441.54/x
  3. Step 3: Cross multiply
    20,690.24x = 31,017.78 × 9,441.54
  4. Step 4: Simplify right side
    20,690.24x = 292,855,610.58
  5. Step 5: Solve for x
    x = 292,855,610.58/20,690.24
  6. Step 6: Final answer
    x = 14,154.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.