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Finding the Fourth Proportional to 39,750.76, 54,854.94 and 21,845.76

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Solution

The fourth proportional to 39,750.76, 54,854.94 and 21,845.76 is: 30,146.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,750.76 : 54,854.94 = 21,845.76 : x
  2. Step 2: Convert to fraction form
    39,750.76/54,854.94 = 21,845.76/x
  3. Step 3: Cross multiply
    39,750.76x = 54,854.94 × 21,845.76
  4. Step 4: Simplify right side
    39,750.76x = 1,198,347,854.05
  5. Step 5: Solve for x
    x = 1,198,347,854.05/39,750.76
  6. Step 6: Final answer
    x = 30,146.54

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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.