Home / 39,675.84-54,755.13-21,770.88

Finding the Fourth Proportional to 39,675.84, 54,755.13 and 21,770.88

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Solution

The fourth proportional to 39,675.84, 54,755.13 and 21,770.88 is: 30,045.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,675.84 : 54,755.13 = 21,770.88 : x
  2. Step 2: Convert to fraction form
    39,675.84/54,755.13 = 21,770.88/x
  3. Step 3: Cross multiply
    39,675.84x = 54,755.13 × 21,770.88
  4. Step 4: Simplify right side
    39,675.84x = 1,192,067,364.61
  5. Step 5: Solve for x
    x = 1,192,067,364.61/39,675.84
  6. Step 6: Final answer
    x = 30,045.17

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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.