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Finding the Fourth Proportional to 7,900.66, 10,922.61 and 6,915.70

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Solution

The fourth proportional to 7,900.66, 10,922.61 and 6,915.70 is: 9,560.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,900.66 : 10,922.61 = 6,915.70 : x
  2. Step 2: Convert to fraction form
    7,900.66/10,922.61 = 6,915.70/x
  3. Step 3: Cross multiply
    7,900.66x = 10,922.61 × 6,915.70
  4. Step 4: Simplify right side
    7,900.66x = 75,537,493.98
  5. Step 5: Solve for x
    x = 75,537,493.98/7,900.66
  6. Step 6: Final answer
    x = 9,560.91

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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.