Home / 8,186.70-12,283.29-5,412.78

Finding the Fourth Proportional to 8,186.70, 12,283.29 and 5,412.78

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Solution

The fourth proportional to 8,186.70, 12,283.29 and 5,412.78 is: 8,121.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,186.70 : 12,283.29 = 5,412.78 : x
  2. Step 2: Convert to fraction form
    8,186.70/12,283.29 = 5,412.78/x
  3. Step 3: Cross multiply
    8,186.70x = 12,283.29 × 5,412.78
  4. Step 4: Simplify right side
    8,186.70x = 66,486,746.45
  5. Step 5: Solve for x
    x = 66,486,746.45/8,186.70
  6. Step 6: Final answer
    x = 8,121.31

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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.