Home / 8,112.89-12,153.55-5,331.11

Finding the Fourth Proportional to 8,112.89, 12,153.55 and 5,331.11

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Solution

The fourth proportional to 8,112.89, 12,153.55 and 5,331.11 is: 7,986.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.89 : 12,153.55 = 5,331.11 : x
  2. Step 2: Convert to fraction form
    8,112.89/12,153.55 = 5,331.11/x
  3. Step 3: Cross multiply
    8,112.89x = 12,153.55 × 5,331.11
  4. Step 4: Simplify right side
    8,112.89x = 64,791,911.94
  5. Step 5: Solve for x
    x = 64,791,911.94/8,112.89
  6. Step 6: Final answer
    x = 7,986.29

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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.