Home / 21,426.80-32,147.24-8,281.20

Finding the Fourth Proportional to 21,426.80, 32,147.24 and 8,281.20

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Solution

The fourth proportional to 21,426.80, 32,147.24 and 8,281.20 is: 12,424.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,426.80 : 32,147.24 = 8,281.20 : x
  2. Step 2: Convert to fraction form
    21,426.80/32,147.24 = 8,281.20/x
  3. Step 3: Cross multiply
    21,426.80x = 32,147.24 × 8,281.20
  4. Step 4: Simplify right side
    21,426.80x = 266,217,723.89
  5. Step 5: Solve for x
    x = 266,217,723.89/21,426.80
  6. Step 6: Final answer
    x = 12,424.52

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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.