Home / 20,789.50-31,184.52-6,938.50

Finding the Fourth Proportional to 20,789.50, 31,184.52 and 6,938.50

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Solution

The fourth proportional to 20,789.50, 31,184.52 and 6,938.50 is: 10,407.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.50 : 31,184.52 = 6,938.50 : x
  2. Step 2: Convert to fraction form
    20,789.50/31,184.52 = 6,938.50/x
  3. Step 3: Cross multiply
    20,789.50x = 31,184.52 × 6,938.50
  4. Step 4: Simplify right side
    20,789.50x = 216,373,792.02
  5. Step 5: Solve for x
    x = 216,373,792.02/20,789.50
  6. Step 6: Final answer
    x = 10,407.84

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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.