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Finding the Fourth Proportional to 7,771.05, 10,725.75 and 5,118.75

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Solution

The fourth proportional to 7,771.05, 10,725.75 and 5,118.75 is: 7,065.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,771.05 : 10,725.75 = 5,118.75 : x
  2. Step 2: Convert to fraction form
    7,771.05/10,725.75 = 5,118.75/x
  3. Step 3: Cross multiply
    7,771.05x = 10,725.75 × 5,118.75
  4. Step 4: Simplify right side
    7,771.05x = 54,902,432.81
  5. Step 5: Solve for x
    x = 54,902,432.81/7,771.05
  6. Step 6: Final answer
    x = 7,065.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.