Home / 30,120.20-41,545.14-21,186.44

Finding the Fourth Proportional to 30,120.20, 41,545.14 and 21,186.44

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Solution

The fourth proportional to 30,120.20, 41,545.14 and 21,186.44 is: 29,222.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,120.20 : 41,545.14 = 21,186.44 : x
  2. Step 2: Convert to fraction form
    30,120.20/41,545.14 = 21,186.44/x
  3. Step 3: Cross multiply
    30,120.20x = 41,545.14 × 21,186.44
  4. Step 4: Simplify right side
    30,120.20x = 880,193,615.90
  5. Step 5: Solve for x
    x = 880,193,615.90/30,120.20
  6. Step 6: Final answer
    x = 29,222.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.