Home / 20,717.76-31,078.37-7,385.60

Finding the Fourth Proportional to 20,717.76, 31,078.37 and 7,385.60

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Solution

The fourth proportional to 20,717.76, 31,078.37 and 7,385.60 is: 11,079.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.76 : 31,078.37 = 7,385.60 : x
  2. Step 2: Convert to fraction form
    20,717.76/31,078.37 = 7,385.60/x
  3. Step 3: Cross multiply
    20,717.76x = 31,078.37 × 7,385.60
  4. Step 4: Simplify right side
    20,717.76x = 229,532,409.47
  5. Step 5: Solve for x
    x = 229,532,409.47/20,717.76
  6. Step 6: Final answer
    x = 11,079.02

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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.