Home / 21,589.20-32,365.80-9,118.80

Finding the Fourth Proportional to 21,589.20, 32,365.80 and 9,118.80

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Solution

The fourth proportional to 21,589.20, 32,365.80 and 9,118.80 is: 13,670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,589.20 : 32,365.80 = 9,118.80 : x
  2. Step 2: Convert to fraction form
    21,589.20/32,365.80 = 9,118.80/x
  3. Step 3: Cross multiply
    21,589.20x = 32,365.80 × 9,118.80
  4. Step 4: Simplify right side
    21,589.20x = 295,137,257.04
  5. Step 5: Solve for x
    x = 295,137,257.04/21,589.20
  6. Step 6: Final answer
    x = 13,670.60

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1.5x scale

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.