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Finding the Fourth Proportional to 5,715.72, 7,887.84 and 3,357.84

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Solution

The fourth proportional to 5,715.72, 7,887.84 and 3,357.84 is: 4,633.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,715.72 : 7,887.84 = 3,357.84 : x
  2. Step 2: Convert to fraction form
    5,715.72/7,887.84 = 3,357.84/x
  3. Step 3: Cross multiply
    5,715.72x = 7,887.84 × 3,357.84
  4. Step 4: Simplify right side
    5,715.72x = 26,486,104.67
  5. Step 5: Solve for x
    x = 26,486,104.67/5,715.72
  6. Step 6: Final answer
    x = 4,633.91

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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.