Home / 20,432.72-30,640.44-6,388.98

Finding the Fourth Proportional to 20,432.72, 30,640.44 and 6,388.98

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Solution

The fourth proportional to 20,432.72, 30,640.44 and 6,388.98 is: 9,580.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.72 : 30,640.44 = 6,388.98 : x
  2. Step 2: Convert to fraction form
    20,432.72/30,640.44 = 6,388.98/x
  3. Step 3: Cross multiply
    20,432.72x = 30,640.44 × 6,388.98
  4. Step 4: Simplify right side
    20,432.72x = 195,761,158.35
  5. Step 5: Solve for x
    x = 195,761,158.35/20,432.72
  6. Step 6: Final answer
    x = 9,580.77

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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.