Home / 20,939.94-28,870.29-17,149.14

Finding the Fourth Proportional to 20,939.94, 28,870.29 and 17,149.14

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Solution

The fourth proportional to 20,939.94, 28,870.29 and 17,149.14 is: 23,643.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.94 : 28,870.29 = 17,149.14 : x
  2. Step 2: Convert to fraction form
    20,939.94/28,870.29 = 17,149.14/x
  3. Step 3: Cross multiply
    20,939.94x = 28,870.29 × 17,149.14
  4. Step 4: Simplify right side
    20,939.94x = 495,100,645.05
  5. Step 5: Solve for x
    x = 495,100,645.05/20,939.94
  6. Step 6: Final answer
    x = 23,643.84

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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.