Home / 28,974-39,984.12-15,726

Finding the Fourth Proportional to 28,974, 39,984.12 and 15,726

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Solution

The fourth proportional to 28,974, 39,984.12 and 15,726 is: 21,701.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,974 : 39,984.12 = 15,726 : x
  2. Step 2: Convert to fraction form
    28,974/39,984.12 = 15,726/x
  3. Step 3: Cross multiply
    28,974x = 39,984.12 × 15,726
  4. Step 4: Simplify right side
    28,974x = 628,790,271.12
  5. Step 5: Solve for x
    x = 628,790,271.12/28,974
  6. Step 6: Final answer
    x = 21,701.88

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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.