Home / 21,459.20-32,275.20-19,212.80

Finding the Fourth Proportional to 21,459.20, 32,275.20 and 19,212.80

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Solution

The fourth proportional to 21,459.20, 32,275.20 and 19,212.80 is: 28,896.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.20 : 32,275.20 = 19,212.80 : x
  2. Step 2: Convert to fraction form
    21,459.20/32,275.20 = 19,212.80/x
  3. Step 3: Cross multiply
    21,459.20x = 32,275.20 × 19,212.80
  4. Step 4: Simplify right side
    21,459.20x = 620,096,962.56
  5. Step 5: Solve for x
    x = 620,096,962.56/21,459.20
  6. Step 6: Final answer
    x = 28,896.56

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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.