Home / 21,621.20-32,406.20-9,141.20

Finding the Fourth Proportional to 21,621.20, 32,406.20 and 9,141.20

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Solution

The fourth proportional to 21,621.20, 32,406.20 and 9,141.20 is: 13,700.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.20 : 32,406.20 = 9,141.20 : x
  2. Step 2: Convert to fraction form
    21,621.20/32,406.20 = 9,141.20/x
  3. Step 3: Cross multiply
    21,621.20x = 32,406.20 × 9,141.20
  4. Step 4: Simplify right side
    21,621.20x = 296,231,555.44
  5. Step 5: Solve for x
    x = 296,231,555.44/21,621.20
  6. Step 6: Final answer
    x = 13,700.98

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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.