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Finding the Fourth Proportional to 8,307.78, 12,462.21 and 2,760.90

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Solution

The fourth proportional to 8,307.78, 12,462.21 and 2,760.90 is: 4,141.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,307.78 : 12,462.21 = 2,760.90 : x
  2. Step 2: Convert to fraction form
    8,307.78/12,462.21 = 2,760.90/x
  3. Step 3: Cross multiply
    8,307.78x = 12,462.21 × 2,760.90
  4. Step 4: Simplify right side
    8,307.78x = 34,406,915.59
  5. Step 5: Solve for x
    x = 34,406,915.59/8,307.78
  6. Step 6: Final answer
    x = 4,141.53

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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.