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Finding the Fourth Proportional to 22,144.64, 30,771.18 and 21,865.19

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Solution

The fourth proportional to 22,144.64, 30,771.18 and 21,865.19 is: 30,382.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,144.64 : 30,771.18 = 21,865.19 : x
  2. Step 2: Convert to fraction form
    22,144.64/30,771.18 = 21,865.19/x
  3. Step 3: Cross multiply
    22,144.64x = 30,771.18 × 21,865.19
  4. Step 4: Simplify right side
    22,144.64x = 672,817,543.37
  5. Step 5: Solve for x
    x = 672,817,543.37/22,144.64
  6. Step 6: Final answer
    x = 30,382.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.