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Finding the Fourth Proportional to 39,751.76, 54,856.32 and 21,846.76

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Solution

The fourth proportional to 39,751.76, 54,856.32 and 21,846.76 is: 30,147.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,751.76 : 54,856.32 = 21,846.76 : x
  2. Step 2: Convert to fraction form
    39,751.76/54,856.32 = 21,846.76/x
  3. Step 3: Cross multiply
    39,751.76x = 54,856.32 × 21,846.76
  4. Step 4: Simplify right side
    39,751.76x = 1,198,432,857.52
  5. Step 5: Solve for x
    x = 1,198,432,857.52/39,751.76
  6. Step 6: Final answer
    x = 30,147.92

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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.