Home / 8,781.30-12,119.36-5,005.83

Finding the Fourth Proportional to 8,781.30, 12,119.36 and 5,005.83

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Solution

The fourth proportional to 8,781.30, 12,119.36 and 5,005.83 is: 6,908.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.30 : 12,119.36 = 5,005.83 : x
  2. Step 2: Convert to fraction form
    8,781.30/12,119.36 = 5,005.83/x
  3. Step 3: Cross multiply
    8,781.30x = 12,119.36 × 5,005.83
  4. Step 4: Simplify right side
    8,781.30x = 60,667,430.84
  5. Step 5: Solve for x
    x = 60,667,430.84/8,781.30
  6. Step 6: Final answer
    x = 6,908.71

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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.