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Finding the Fourth Proportional to 35,678.80, 49,229.16 and 21,531.40

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Solution

The fourth proportional to 35,678.80, 49,229.16 and 21,531.40 is: 29,708.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,678.80 : 49,229.16 = 21,531.40 : x
  2. Step 2: Convert to fraction form
    35,678.80/49,229.16 = 21,531.40/x
  3. Step 3: Cross multiply
    35,678.80x = 49,229.16 × 21,531.40
  4. Step 4: Simplify right side
    35,678.80x = 1,059,972,735.62
  5. Step 5: Solve for x
    x = 1,059,972,735.62/35,678.80
  6. Step 6: Final answer
    x = 29,708.76

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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.