Home / 20,393.24-28,142.94-11,440.20

Finding the Fourth Proportional to 20,393.24, 28,142.94 and 11,440.20

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Solution

The fourth proportional to 20,393.24, 28,142.94 and 11,440.20 is: 15,787.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.24 : 28,142.94 = 11,440.20 : x
  2. Step 2: Convert to fraction form
    20,393.24/28,142.94 = 11,440.20/x
  3. Step 3: Cross multiply
    20,393.24x = 28,142.94 × 11,440.20
  4. Step 4: Simplify right side
    20,393.24x = 321,960,862.19
  5. Step 5: Solve for x
    x = 321,960,862.19/20,393.24
  6. Step 6: Final answer
    x = 15,787.63

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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.