Home / 20,867.80-31,301.76-5,285.44

Finding the Fourth Proportional to 20,867.80, 31,301.76 and 5,285.44

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Solution

The fourth proportional to 20,867.80, 31,301.76 and 5,285.44 is: 7,928.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.80 : 31,301.76 = 5,285.44 : x
  2. Step 2: Convert to fraction form
    20,867.80/31,301.76 = 5,285.44/x
  3. Step 3: Cross multiply
    20,867.80x = 31,301.76 × 5,285.44
  4. Step 4: Simplify right side
    20,867.80x = 165,443,574.37
  5. Step 5: Solve for x
    x = 165,443,574.37/20,867.80
  6. Step 6: Final answer
    x = 7,928.18

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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.