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Finding the Fourth Proportional to 7,611.96, 10,507.68 and 5,515.68

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Solution

The fourth proportional to 7,611.96, 10,507.68 and 5,515.68 is: 7,613.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,611.96 : 10,507.68 = 5,515.68 : x
  2. Step 2: Convert to fraction form
    7,611.96/10,507.68 = 5,515.68/x
  3. Step 3: Cross multiply
    7,611.96x = 10,507.68 × 5,515.68
  4. Step 4: Simplify right side
    7,611.96x = 57,957,000.42
  5. Step 5: Solve for x
    x = 57,957,000.42/7,611.96
  6. Step 6: Final answer
    x = 7,613.94

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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.