Home / 20,728.17-31,096.95-7,580.54

Finding the Fourth Proportional to 20,728.17, 31,096.95 and 7,580.54

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Solution

The fourth proportional to 20,728.17, 31,096.95 and 7,580.54 is: 11,372.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.17 : 31,096.95 = 7,580.54 : x
  2. Step 2: Convert to fraction form
    20,728.17/31,096.95 = 7,580.54/x
  3. Step 3: Cross multiply
    20,728.17x = 31,096.95 × 7,580.54
  4. Step 4: Simplify right side
    20,728.17x = 235,731,517.87
  5. Step 5: Solve for x
    x = 235,731,517.87/20,728.17
  6. Step 6: Final answer
    x = 11,372.52

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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.