Home / 21,986.20-32,979.30-10,322.20

Finding the Fourth Proportional to 21,986.20, 32,979.30 and 10,322.20

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Solution

The fourth proportional to 21,986.20, 32,979.30 and 10,322.20 is: 15,483.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.20 : 32,979.30 = 10,322.20 : x
  2. Step 2: Convert to fraction form
    21,986.20/32,979.30 = 10,322.20/x
  3. Step 3: Cross multiply
    21,986.20x = 32,979.30 × 10,322.20
  4. Step 4: Simplify right side
    21,986.20x = 340,418,930.46
  5. Step 5: Solve for x
    x = 340,418,930.46/21,986.20
  6. Step 6: Final answer
    x = 15,483.30

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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.