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Finding the Fourth Proportional to 39,860.97, 55,010.63 and 21,955.97

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Solution

The fourth proportional to 39,860.97, 55,010.63 and 21,955.97 is: 30,300.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,860.97 : 55,010.63 = 21,955.97 : x
  2. Step 2: Convert to fraction form
    39,860.97/55,010.63 = 21,955.97/x
  3. Step 3: Cross multiply
    39,860.97x = 55,010.63 × 21,955.97
  4. Step 4: Simplify right side
    39,860.97x = 1,207,811,741.96
  5. Step 5: Solve for x
    x = 1,207,811,741.96/39,860.97
  6. Step 6: Final answer
    x = 30,300.61

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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.