Home / 13,729.76-20,576.63-7,809.38

Finding the Fourth Proportional to 13,729.76, 20,576.63 and 7,809.38

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Solution

The fourth proportional to 13,729.76, 20,576.63 and 7,809.38 is: 11,703.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.76 : 20,576.63 = 7,809.38 : x
  2. Step 2: Convert to fraction form
    13,729.76/20,576.63 = 7,809.38/x
  3. Step 3: Cross multiply
    13,729.76x = 20,576.63 × 7,809.38
  4. Step 4: Simplify right side
    13,729.76x = 160,690,580.86
  5. Step 5: Solve for x
    x = 160,690,580.86/13,729.76
  6. Step 6: Final answer
    x = 11,703.82

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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.