Home / 12,587.77-17,382.81-8,119.27

Finding the Fourth Proportional to 12,587.77, 17,382.81 and 8,119.27

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Solution

The fourth proportional to 12,587.77, 17,382.81 and 8,119.27 is: 11,212.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.77 : 17,382.81 = 8,119.27 : x
  2. Step 2: Convert to fraction form
    12,587.77/17,382.81 = 8,119.27/x
  3. Step 3: Cross multiply
    12,587.77x = 17,382.81 × 8,119.27
  4. Step 4: Simplify right side
    12,587.77x = 141,135,727.75
  5. Step 5: Solve for x
    x = 141,135,727.75/12,587.77
  6. Step 6: Final answer
    x = 11,212.13

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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.