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Finding the Fourth Proportional to 7,910.31, 10,915.91 and 4,325.21

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Solution

The fourth proportional to 7,910.31, 10,915.91 and 4,325.21 is: 5,968.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,910.31 : 10,915.91 = 4,325.21 : x
  2. Step 2: Convert to fraction form
    7,910.31/10,915.91 = 4,325.21/x
  3. Step 3: Cross multiply
    7,910.31x = 10,915.91 × 4,325.21
  4. Step 4: Simplify right side
    7,910.31x = 47,213,526.89
  5. Step 5: Solve for x
    x = 47,213,526.89/7,910.31
  6. Step 6: Final answer
    x = 5,968.61

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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.