Home / 21,456.20-32,270.70-19,209.80

Finding the Fourth Proportional to 21,456.20, 32,270.70 and 19,209.80

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Solution

The fourth proportional to 21,456.20, 32,270.70 and 19,209.80 is: 28,892.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.20 : 32,270.70 = 19,209.80 : x
  2. Step 2: Convert to fraction form
    21,456.20/32,270.70 = 19,209.80/x
  3. Step 3: Cross multiply
    21,456.20x = 32,270.70 × 19,209.80
  4. Step 4: Simplify right side
    21,456.20x = 619,913,692.86
  5. Step 5: Solve for x
    x = 619,913,692.86/21,456.20
  6. Step 6: Final answer
    x = 28,892.05

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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.