Home / 20,464.86-30,702.39-7,138.04

Finding the Fourth Proportional to 20,464.86, 30,702.39 and 7,138.04

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Solution

The fourth proportional to 20,464.86, 30,702.39 and 7,138.04 is: 10,708.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,464.86 : 30,702.39 = 7,138.04 : x
  2. Step 2: Convert to fraction form
    20,464.86/30,702.39 = 7,138.04/x
  3. Step 3: Cross multiply
    20,464.86x = 30,702.39 × 7,138.04
  4. Step 4: Simplify right side
    20,464.86x = 219,154,982.52
  5. Step 5: Solve for x
    x = 219,154,982.52/20,464.86
  6. Step 6: Final answer
    x = 10,708.85

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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.