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Finding the Fourth Proportional to 22,407.87, 30,921.74 and 12,336.05

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Solution

The fourth proportional to 22,407.87, 30,921.74 and 12,336.05 is: 17,023.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,407.87 : 30,921.74 = 12,336.05 : x
  2. Step 2: Convert to fraction form
    22,407.87/30,921.74 = 12,336.05/x
  3. Step 3: Cross multiply
    22,407.87x = 30,921.74 × 12,336.05
  4. Step 4: Simplify right side
    22,407.87x = 381,452,130.73
  5. Step 5: Solve for x
    x = 381,452,130.73/22,407.87
  6. Step 6: Final answer
    x = 17,023.13

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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.