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Finding the Fourth Proportional to 39,772.67, 54,885.79 and 21,867.51

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Solution

The fourth proportional to 39,772.67, 54,885.79 and 21,867.51 is: 30,176.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,772.67 : 54,885.79 = 21,867.51 : x
  2. Step 2: Convert to fraction form
    39,772.67/54,885.79 = 21,867.51/x
  3. Step 3: Cross multiply
    39,772.67x = 54,885.79 × 21,867.51
  4. Step 4: Simplify right side
    39,772.67x = 1,200,215,671.83
  5. Step 5: Solve for x
    x = 1,200,215,671.83/39,772.67
  6. Step 6: Final answer
    x = 30,176.90

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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.