Home / 28,969.97-39,979.13-18,904.85

Finding the Fourth Proportional to 28,969.97, 39,979.13 and 18,904.85

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Solution

The fourth proportional to 28,969.97, 39,979.13 and 18,904.85 is: 26,089.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,969.97 : 39,979.13 = 18,904.85 : x
  2. Step 2: Convert to fraction form
    28,969.97/39,979.13 = 18,904.85/x
  3. Step 3: Cross multiply
    28,969.97x = 39,979.13 × 18,904.85
  4. Step 4: Simplify right side
    28,969.97x = 755,799,361.26
  5. Step 5: Solve for x
    x = 755,799,361.26/28,969.97
  6. Step 6: Final answer
    x = 26,089.06

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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.