Home / 43,731.20-65,521.20-20,309.60

Finding the Fourth Proportional to 43,731.20, 65,521.20 and 20,309.60

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Solution

The fourth proportional to 43,731.20, 65,521.20 and 20,309.60 is: 30,429.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,731.20 : 65,521.20 = 20,309.60 : x
  2. Step 2: Convert to fraction form
    43,731.20/65,521.20 = 20,309.60/x
  3. Step 3: Cross multiply
    43,731.20x = 65,521.20 × 20,309.60
  4. Step 4: Simplify right side
    43,731.20x = 1,330,709,363.52
  5. Step 5: Solve for x
    x = 1,330,709,363.52/43,731.20
  6. Step 6: Final answer
    x = 30,429.29

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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.