Home / 18,919.91-28,383.95-5,771.88

Finding the Fourth Proportional to 18,919.91, 28,383.95 and 5,771.88

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Solution

The fourth proportional to 18,919.91, 28,383.95 and 5,771.88 is: 8,659.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.91 : 28,383.95 = 5,771.88 : x
  2. Step 2: Convert to fraction form
    18,919.91/28,383.95 = 5,771.88/x
  3. Step 3: Cross multiply
    18,919.91x = 28,383.95 × 5,771.88
  4. Step 4: Simplify right side
    18,919.91x = 163,828,767.76
  5. Step 5: Solve for x
    x = 163,828,767.76/18,919.91
  6. Step 6: Final answer
    x = 8,659.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.