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Finding the Fourth Proportional to 8,153.15, 12,119.75 and 7,913.71

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Solution

The fourth proportional to 8,153.15, 12,119.75 and 7,913.71 is: 11,763.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,153.15 : 12,119.75 = 7,913.71 : x
  2. Step 2: Convert to fraction form
    8,153.15/12,119.75 = 7,913.71/x
  3. Step 3: Cross multiply
    8,153.15x = 12,119.75 × 7,913.71
  4. Step 4: Simplify right side
    8,153.15x = 95,912,147.20
  5. Step 5: Solve for x
    x = 95,912,147.20/8,153.15
  6. Step 6: Final answer
    x = 11,763.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.