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Finding the Fourth Proportional to 22,405.95, 30,920.94 and 12,335.42

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Solution

The fourth proportional to 22,405.95, 30,920.94 and 12,335.42 is: 17,023.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,405.95 : 30,920.94 = 12,335.42 : x
  2. Step 2: Convert to fraction form
    22,405.95/30,920.94 = 12,335.42/x
  3. Step 3: Cross multiply
    22,405.95x = 30,920.94 × 12,335.42
  4. Step 4: Simplify right side
    22,405.95x = 381,422,859.00
  5. Step 5: Solve for x
    x = 381,422,859.00/22,405.95
  6. Step 6: Final answer
    x = 17,023.28

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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.