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Finding the Fourth Proportional to 5,349.71, 7,382.60 and 2,991.86

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Solution

The fourth proportional to 5,349.71, 7,382.60 and 2,991.86 is: 4,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,349.71 : 7,382.60 = 2,991.86 : x
  2. Step 2: Convert to fraction form
    5,349.71/7,382.60 = 2,991.86/x
  3. Step 3: Cross multiply
    5,349.71x = 7,382.60 × 2,991.86
  4. Step 4: Simplify right side
    5,349.71x = 22,087,692.67
  5. Step 5: Solve for x
    x = 22,087,692.67/5,349.71
  6. Step 6: Final answer
    x = 4,128.76

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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.