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Finding the Fourth Proportional to 5,640.42, 7,785.96 and 5,049.93

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Solution

The fourth proportional to 5,640.42, 7,785.96 and 5,049.93 is: 6,970.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.42 : 7,785.96 = 5,049.93 : x
  2. Step 2: Convert to fraction form
    5,640.42/7,785.96 = 5,049.93/x
  3. Step 3: Cross multiply
    5,640.42x = 7,785.96 × 5,049.93
  4. Step 4: Simplify right side
    5,640.42x = 39,318,552.98
  5. Step 5: Solve for x
    x = 39,318,552.98/5,640.42
  6. Step 6: Final answer
    x = 6,970.86

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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.