Home / 27,718.88-38,251.20-15,783.92

Finding the Fourth Proportional to 27,718.88, 38,251.20 and 15,783.92

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Solution

The fourth proportional to 27,718.88, 38,251.20 and 15,783.92 is: 21,781.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,718.88 : 38,251.20 = 15,783.92 : x
  2. Step 2: Convert to fraction form
    27,718.88/38,251.20 = 15,783.92/x
  3. Step 3: Cross multiply
    27,718.88x = 38,251.20 × 15,783.92
  4. Step 4: Simplify right side
    27,718.88x = 603,753,880.70
  5. Step 5: Solve for x
    x = 603,753,880.70/27,718.88
  6. Step 6: Final answer
    x = 21,781.32

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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.