Home / 8,112.90-12,169.35-3,186.06

Finding the Fourth Proportional to 8,112.90, 12,169.35 and 3,186.06

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Solution

The fourth proportional to 8,112.90, 12,169.35 and 3,186.06 is: 4,779.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.90 : 12,169.35 = 3,186.06 : x
  2. Step 2: Convert to fraction form
    8,112.90/12,169.35 = 3,186.06/x
  3. Step 3: Cross multiply
    8,112.90x = 12,169.35 × 3,186.06
  4. Step 4: Simplify right side
    8,112.90x = 38,772,279.26
  5. Step 5: Solve for x
    x = 38,772,279.26/8,112.90
  6. Step 6: Final answer
    x = 4,779.09

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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.