Home / 12,118.77-16,719.57-7,081.20

Finding the Fourth Proportional to 12,118.77, 16,719.57 and 7,081.20

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Solution

The fourth proportional to 12,118.77, 16,719.57 and 7,081.20 is: 9,769.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,118.77 : 16,719.57 = 7,081.20 : x
  2. Step 2: Convert to fraction form
    12,118.77/16,719.57 = 7,081.20/x
  3. Step 3: Cross multiply
    12,118.77x = 16,719.57 × 7,081.20
  4. Step 4: Simplify right side
    12,118.77x = 118,394,619.08
  5. Step 5: Solve for x
    x = 118,394,619.08/12,118.77
  6. Step 6: Final answer
    x = 9,769.52

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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.