Home / 21,621.45-32,419.20-8,458.14

Finding the Fourth Proportional to 21,621.45, 32,419.20 and 8,458.14

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Solution

The fourth proportional to 21,621.45, 32,419.20 and 8,458.14 is: 12,682.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.45 : 32,419.20 = 8,458.14 : x
  2. Step 2: Convert to fraction form
    21,621.45/32,419.20 = 8,458.14/x
  3. Step 3: Cross multiply
    21,621.45x = 32,419.20 × 8,458.14
  4. Step 4: Simplify right side
    21,621.45x = 274,206,132.29
  5. Step 5: Solve for x
    x = 274,206,132.29/21,621.45
  6. Step 6: Final answer
    x = 12,682.13

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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.