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Finding the Fourth Proportional to 7,757.21, 11,548.07 and 7,711.08

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Solution

The fourth proportional to 7,757.21, 11,548.07 and 7,711.08 is: 11,479.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,757.21 : 11,548.07 = 7,711.08 : x
  2. Step 2: Convert to fraction form
    7,757.21/11,548.07 = 7,711.08/x
  3. Step 3: Cross multiply
    7,757.21x = 11,548.07 × 7,711.08
  4. Step 4: Simplify right side
    7,757.21x = 89,048,082.02
  5. Step 5: Solve for x
    x = 89,048,082.02/7,757.21
  6. Step 6: Final answer
    x = 11,479.40

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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.