Home / 28,974.75-39,985.16-15,726.75

Finding the Fourth Proportional to 28,974.75, 39,985.16 and 15,726.75

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Solution

The fourth proportional to 28,974.75, 39,985.16 and 15,726.75 is: 21,702.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,974.75 : 39,985.16 = 15,726.75 : x
  2. Step 2: Convert to fraction form
    28,974.75/39,985.16 = 15,726.75/x
  3. Step 3: Cross multiply
    28,974.75x = 39,985.16 × 15,726.75
  4. Step 4: Simplify right side
    28,974.75x = 628,836,536.40
  5. Step 5: Solve for x
    x = 628,836,536.40/28,974.75
  6. Step 6: Final answer
    x = 21,702.92

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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.