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Finding the Fourth Proportional to 7,276.72, 10,915.08 and 3,379

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Solution

The fourth proportional to 7,276.72, 10,915.08 and 3,379 is: 5,068.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,276.72 : 10,915.08 = 3,379 : x
  2. Step 2: Convert to fraction form
    7,276.72/10,915.08 = 3,379/x
  3. Step 3: Cross multiply
    7,276.72x = 10,915.08 × 3,379
  4. Step 4: Simplify right side
    7,276.72x = 36,882,055.32
  5. Step 5: Solve for x
    x = 36,882,055.32/7,276.72
  6. Step 6: Final answer
    x = 5,068.50

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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.