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Finding the Fourth Proportional to 22,405.68, 30,919.95 and 12,335.13

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Solution

The fourth proportional to 22,405.68, 30,919.95 and 12,335.13 is: 17,022.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,405.68 : 30,919.95 = 12,335.13 : x
  2. Step 2: Convert to fraction form
    22,405.68/30,919.95 = 12,335.13/x
  3. Step 3: Cross multiply
    22,405.68x = 30,919.95 × 12,335.13
  4. Step 4: Simplify right side
    22,405.68x = 381,401,602.84
  5. Step 5: Solve for x
    x = 381,401,602.84/22,405.68
  6. Step 6: Final answer
    x = 17,022.54

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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.