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Finding the Fourth Proportional to 7,907.80, 10,912.84 and 4,322.86

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Solution

The fourth proportional to 7,907.80, 10,912.84 and 4,322.86 is: 5,965.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,907.80 : 10,912.84 = 4,322.86 : x
  2. Step 2: Convert to fraction form
    7,907.80/10,912.84 = 4,322.86/x
  3. Step 3: Cross multiply
    7,907.80x = 10,912.84 × 4,322.86
  4. Step 4: Simplify right side
    7,907.80x = 47,174,679.52
  5. Step 5: Solve for x
    x = 47,174,679.52/7,907.80
  6. Step 6: Final answer
    x = 5,965.59

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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.