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Finding the Fourth Proportional to 7,912.84, 10,915.74 and 7,349.98

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Solution

The fourth proportional to 7,912.84, 10,915.74 and 7,349.98 is: 10,139.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.84 : 10,915.74 = 7,349.98 : x
  2. Step 2: Convert to fraction form
    7,912.84/10,915.74 = 7,349.98/x
  3. Step 3: Cross multiply
    7,912.84x = 10,915.74 × 7,349.98
  4. Step 4: Simplify right side
    7,912.84x = 80,230,470.69
  5. Step 5: Solve for x
    x = 80,230,470.69/7,912.84
  6. Step 6: Final answer
    x = 10,139.28

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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.