Home / 27,727.20-38,238-18,787.80

Finding the Fourth Proportional to 27,727.20, 38,238 and 18,787.80

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Solution

The fourth proportional to 27,727.20, 38,238 and 18,787.80 is: 25,909.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,727.20 : 38,238 = 18,787.80 : x
  2. Step 2: Convert to fraction form
    27,727.20/38,238 = 18,787.80/x
  3. Step 3: Cross multiply
    27,727.20x = 38,238 × 18,787.80
  4. Step 4: Simplify right side
    27,727.20x = 718,407,896.40
  5. Step 5: Solve for x
    x = 718,407,896.40/27,727.20
  6. Step 6: Final answer
    x = 25,909.86

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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.