Home / 19,207.20-28,810.80-8,121.90

Finding the Fourth Proportional to 19,207.20, 28,810.80 and 8,121.90

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Solution

The fourth proportional to 19,207.20, 28,810.80 and 8,121.90 is: 12,182.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,207.20 : 28,810.80 = 8,121.90 : x
  2. Step 2: Convert to fraction form
    19,207.20/28,810.80 = 8,121.90/x
  3. Step 3: Cross multiply
    19,207.20x = 28,810.80 × 8,121.90
  4. Step 4: Simplify right side
    19,207.20x = 233,998,436.52
  5. Step 5: Solve for x
    x = 233,998,436.52/19,207.20
  6. Step 6: Final answer
    x = 12,182.85

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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.