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Finding the Fourth Proportional to 29,676.52, 40,987.02 and 20,228.68

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Solution

The fourth proportional to 29,676.52, 40,987.02 and 20,228.68 is: 27,938.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,676.52 : 40,987.02 = 20,228.68 : x
  2. Step 2: Convert to fraction form
    29,676.52/40,987.02 = 20,228.68/x
  3. Step 3: Cross multiply
    29,676.52x = 40,987.02 × 20,228.68
  4. Step 4: Simplify right side
    29,676.52x = 829,113,311.73
  5. Step 5: Solve for x
    x = 829,113,311.73/29,676.52
  6. Step 6: Final answer
    x = 27,938.36

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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.