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Finding the Fourth Proportional to 7,907.91, 10,912.61 and 4,551.80

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Solution

The fourth proportional to 7,907.91, 10,912.61 and 4,551.80 is: 6,281.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,907.91 : 10,912.61 = 4,551.80 : x
  2. Step 2: Convert to fraction form
    7,907.91/10,912.61 = 4,551.80/x
  3. Step 3: Cross multiply
    7,907.91x = 10,912.61 × 4,551.80
  4. Step 4: Simplify right side
    7,907.91x = 49,672,018.20
  5. Step 5: Solve for x
    x = 49,672,018.20/7,907.91
  6. Step 6: Final answer
    x = 6,281.31

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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.