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Finding the Fourth Proportional to 41,139.40, 61,694.70 and 21,411.40

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Solution

The fourth proportional to 41,139.40, 61,694.70 and 21,411.40 is: 32,109.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,139.40 : 61,694.70 = 21,411.40 : x
  2. Step 2: Convert to fraction form
    41,139.40/61,694.70 = 21,411.40/x
  3. Step 3: Cross multiply
    41,139.40x = 61,694.70 × 21,411.40
  4. Step 4: Simplify right side
    41,139.40x = 1,320,969,899.58
  5. Step 5: Solve for x
    x = 1,320,969,899.58/41,139.40
  6. Step 6: Final answer
    x = 32,109.61

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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.