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Finding the Fourth Proportional to 39,386, 54,353.16 and 22,620.56

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Solution

The fourth proportional to 39,386, 54,353.16 and 22,620.56 is: 31,216.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,386 : 54,353.16 = 22,620.56 : x
  2. Step 2: Convert to fraction form
    39,386/54,353.16 = 22,620.56/x
  3. Step 3: Cross multiply
    39,386x = 54,353.16 × 22,620.56
  4. Step 4: Simplify right side
    39,386x = 1,229,498,916.97
  5. Step 5: Solve for x
    x = 1,229,498,916.97/39,386
  6. Step 6: Final answer
    x = 31,216.65

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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.