Home / 8,712.91-13,071.35-2,790.19

Finding the Fourth Proportional to 8,712.91, 13,071.35 and 2,790.19

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Solution

The fourth proportional to 8,712.91, 13,071.35 and 2,790.19 is: 4,185.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.91 : 13,071.35 = 2,790.19 : x
  2. Step 2: Convert to fraction form
    8,712.91/13,071.35 = 2,790.19/x
  3. Step 3: Cross multiply
    8,712.91x = 13,071.35 × 2,790.19
  4. Step 4: Simplify right side
    8,712.91x = 36,471,550.06
  5. Step 5: Solve for x
    x = 36,471,550.06/8,712.91
  6. Step 6: Final answer
    x = 4,185.92

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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.