Home / 26,747.20-40,120.80-18,971.20

Finding the Fourth Proportional to 26,747.20, 40,120.80 and 18,971.20

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Solution

The fourth proportional to 26,747.20, 40,120.80 and 18,971.20 is: 28,456.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,747.20 : 40,120.80 = 18,971.20 : x
  2. Step 2: Convert to fraction form
    26,747.20/40,120.80 = 18,971.20/x
  3. Step 3: Cross multiply
    26,747.20x = 40,120.80 × 18,971.20
  4. Step 4: Simplify right side
    26,747.20x = 761,139,720.96
  5. Step 5: Solve for x
    x = 761,139,720.96/26,747.20
  6. Step 6: Final answer
    x = 28,456.80

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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.