Home / 12,186.06-18,279.77-3,421.68

Finding the Fourth Proportional to 12,186.06, 18,279.77 and 3,421.68

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Solution

The fourth proportional to 12,186.06, 18,279.77 and 3,421.68 is: 5,132.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.06 : 18,279.77 = 3,421.68 : x
  2. Step 2: Convert to fraction form
    12,186.06/18,279.77 = 3,421.68/x
  3. Step 3: Cross multiply
    12,186.06x = 18,279.77 × 3,421.68
  4. Step 4: Simplify right side
    12,186.06x = 62,547,506.31
  5. Step 5: Solve for x
    x = 62,547,506.31/12,186.06
  6. Step 6: Final answer
    x = 5,132.71

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1.5x scale

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.