Home / 20,968.48-31,453.04-5,385.76

Finding the Fourth Proportional to 20,968.48, 31,453.04 and 5,385.76

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Solution

The fourth proportional to 20,968.48, 31,453.04 and 5,385.76 is: 8,078.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.48 : 31,453.04 = 5,385.76 : x
  2. Step 2: Convert to fraction form
    20,968.48/31,453.04 = 5,385.76/x
  3. Step 3: Cross multiply
    20,968.48x = 31,453.04 × 5,385.76
  4. Step 4: Simplify right side
    20,968.48x = 169,398,524.71
  5. Step 5: Solve for x
    x = 169,398,524.71/20,968.48
  6. Step 6: Final answer
    x = 8,078.72

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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.