Home / 21,214.60-31,821.90-18,233.80

Finding the Fourth Proportional to 21,214.60, 31,821.90 and 18,233.80

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Solution

The fourth proportional to 21,214.60, 31,821.90 and 18,233.80 is: 27,350.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.60 : 31,821.90 = 18,233.80 : x
  2. Step 2: Convert to fraction form
    21,214.60/31,821.90 = 18,233.80/x
  3. Step 3: Cross multiply
    21,214.60x = 31,821.90 × 18,233.80
  4. Step 4: Simplify right side
    21,214.60x = 580,234,160.22
  5. Step 5: Solve for x
    x = 580,234,160.22/21,214.60
  6. Step 6: Final answer
    x = 27,350.70

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1.5x scale

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.