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Finding the Fourth Proportional to 40,943.80, 61,415.70 and 21,260.80

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Solution

The fourth proportional to 40,943.80, 61,415.70 and 21,260.80 is: 31,891.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,943.80 : 61,415.70 = 21,260.80 : x
  2. Step 2: Convert to fraction form
    40,943.80/61,415.70 = 21,260.80/x
  3. Step 3: Cross multiply
    40,943.80x = 61,415.70 × 21,260.80
  4. Step 4: Simplify right side
    40,943.80x = 1,305,746,914.56
  5. Step 5: Solve for x
    x = 1,305,746,914.56/40,943.80
  6. Step 6: Final answer
    x = 31,891.20

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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.