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Finding the Fourth Proportional to 39,773.40, 54,886.56 and 21,868.20

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Solution

The fourth proportional to 39,773.40, 54,886.56 and 21,868.20 is: 30,177.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,773.40 : 54,886.56 = 21,868.20 : x
  2. Step 2: Convert to fraction form
    39,773.40/54,886.56 = 21,868.20/x
  3. Step 3: Cross multiply
    39,773.40x = 54,886.56 × 21,868.20
  4. Step 4: Simplify right side
    39,773.40x = 1,200,270,271.39
  5. Step 5: Solve for x
    x = 1,200,270,271.39/39,773.40
  6. Step 6: Final answer
    x = 30,177.71

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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.