Home / 20,986.08-28,963.94-15,942

Finding the Fourth Proportional to 20,986.08, 28,963.94 and 15,942

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Solution

The fourth proportional to 20,986.08, 28,963.94 and 15,942 is: 22,002.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.08 : 28,963.94 = 15,942 : x
  2. Step 2: Convert to fraction form
    20,986.08/28,963.94 = 15,942/x
  3. Step 3: Cross multiply
    20,986.08x = 28,963.94 × 15,942
  4. Step 4: Simplify right side
    20,986.08x = 461,743,131.48
  5. Step 5: Solve for x
    x = 461,743,131.48/20,986.08
  6. Step 6: Final answer
    x = 22,002.35

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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.