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Finding the Fourth Proportional to 15,121.80, 22,682.70 and 12,934.80

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Solution

The fourth proportional to 15,121.80, 22,682.70 and 12,934.80 is: 19,402.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.80 : 22,682.70 = 12,934.80 : x
  2. Step 2: Convert to fraction form
    15,121.80/22,682.70 = 12,934.80/x
  3. Step 3: Cross multiply
    15,121.80x = 22,682.70 × 12,934.80
  4. Step 4: Simplify right side
    15,121.80x = 293,396,187.96
  5. Step 5: Solve for x
    x = 293,396,187.96/15,121.80
  6. Step 6: Final answer
    x = 19,402.20

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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.