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Finding the Fourth Proportional to 22,211, 30,650.28 and 12,139.78

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Solution

The fourth proportional to 22,211, 30,650.28 and 12,139.78 is: 16,752.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,211 : 30,650.28 = 12,139.78 : x
  2. Step 2: Convert to fraction form
    22,211/30,650.28 = 12,139.78/x
  3. Step 3: Cross multiply
    22,211x = 30,650.28 × 12,139.78
  4. Step 4: Simplify right side
    22,211x = 372,087,656.14
  5. Step 5: Solve for x
    x = 372,087,656.14/22,211
  6. Step 6: Final answer
    x = 16,752.40

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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.