Home / 43,811.20-65,641.20-20,389.60

Finding the Fourth Proportional to 43,811.20, 65,641.20 and 20,389.60

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Solution

The fourth proportional to 43,811.20, 65,641.20 and 20,389.60 is: 30,549.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,811.20 : 65,641.20 = 20,389.60 : x
  2. Step 2: Convert to fraction form
    43,811.20/65,641.20 = 20,389.60/x
  3. Step 3: Cross multiply
    43,811.20x = 65,641.20 × 20,389.60
  4. Step 4: Simplify right side
    43,811.20x = 1,338,397,811.52
  5. Step 5: Solve for x
    x = 1,338,397,811.52/43,811.20
  6. Step 6: Final answer
    x = 30,549.22

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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.