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Finding the Fourth Proportional to 39,703.62, 54,792.42 and 21,799.98

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Solution

The fourth proportional to 39,703.62, 54,792.42 and 21,799.98 is: 30,084.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,703.62 : 54,792.42 = 21,799.98 : x
  2. Step 2: Convert to fraction form
    39,703.62/54,792.42 = 21,799.98/x
  3. Step 3: Cross multiply
    39,703.62x = 54,792.42 × 21,799.98
  4. Step 4: Simplify right side
    39,703.62x = 1,194,473,660.15
  5. Step 5: Solve for x
    x = 1,194,473,660.15/39,703.62
  6. Step 6: Final answer
    x = 30,084.75

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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.