Home / 9,187.14-12,659.49-8,690.91

Finding the Fourth Proportional to 9,187.14, 12,659.49 and 8,690.91

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Solution

The fourth proportional to 9,187.14, 12,659.49 and 8,690.91 is: 11,975.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,187.14 : 12,659.49 = 8,690.91 : x
  2. Step 2: Convert to fraction form
    9,187.14/12,659.49 = 8,690.91/x
  3. Step 3: Cross multiply
    9,187.14x = 12,659.49 × 8,690.91
  4. Step 4: Simplify right side
    9,187.14x = 110,022,488.24
  5. Step 5: Solve for x
    x = 110,022,488.24/9,187.14
  6. Step 6: Final answer
    x = 11,975.71

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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.