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Finding the Fourth Proportional to 39,641.70, 54,706.07 and 21,736.66

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Solution

The fourth proportional to 39,641.70, 54,706.07 and 21,736.66 is: 29,996.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,641.70 : 54,706.07 = 21,736.66 : x
  2. Step 2: Convert to fraction form
    39,641.70/54,706.07 = 21,736.66/x
  3. Step 3: Cross multiply
    39,641.70x = 54,706.07 × 21,736.66
  4. Step 4: Simplify right side
    39,641.70x = 1,189,127,243.53
  5. Step 5: Solve for x
    x = 1,189,127,243.53/39,641.70
  6. Step 6: Final answer
    x = 29,996.88

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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.