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Finding the Fourth Proportional to 39,893.76, 59,789.75 and 21,182.76

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Solution

The fourth proportional to 39,893.76, 59,789.75 and 21,182.76 is: 31,747.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,893.76 : 59,789.75 = 21,182.76 : x
  2. Step 2: Convert to fraction form
    39,893.76/59,789.75 = 21,182.76/x
  3. Step 3: Cross multiply
    39,893.76x = 59,789.75 × 21,182.76
  4. Step 4: Simplify right side
    39,893.76x = 1,266,511,977.67
  5. Step 5: Solve for x
    x = 1,266,511,977.67/39,893.76
  6. Step 6: Final answer
    x = 31,747.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.