Home / 20,458.08-30,672.90-10,443.36

Finding the Fourth Proportional to 20,458.08, 30,672.90 and 10,443.36

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Solution

The fourth proportional to 20,458.08, 30,672.90 and 10,443.36 is: 15,657.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,458.08 : 30,672.90 = 10,443.36 : x
  2. Step 2: Convert to fraction form
    20,458.08/30,672.90 = 10,443.36/x
  3. Step 3: Cross multiply
    20,458.08x = 30,672.90 × 10,443.36
  4. Step 4: Simplify right side
    20,458.08x = 320,328,136.94
  5. Step 5: Solve for x
    x = 320,328,136.94/20,458.08
  6. Step 6: Final answer
    x = 15,657.78

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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.