Home / 8,121.08-12,186.39-5,159.40

Finding the Fourth Proportional to 8,121.08, 12,186.39 and 5,159.40

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Solution

The fourth proportional to 8,121.08, 12,186.39 and 5,159.40 is: 7,742.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.08 : 12,186.39 = 5,159.40 : x
  2. Step 2: Convert to fraction form
    8,121.08/12,186.39 = 5,159.40/x
  3. Step 3: Cross multiply
    8,121.08x = 12,186.39 × 5,159.40
  4. Step 4: Simplify right side
    8,121.08x = 62,874,460.57
  5. Step 5: Solve for x
    x = 62,874,460.57/8,121.08
  6. Step 6: Final answer
    x = 7,742.14

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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.