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Finding the Fourth Proportional to 5,590.70, 7,715.15 and 3,072.96

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Solution

The fourth proportional to 5,590.70, 7,715.15 and 3,072.96 is: 4,240.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,590.70 : 7,715.15 = 3,072.96 : x
  2. Step 2: Convert to fraction form
    5,590.70/7,715.15 = 3,072.96/x
  3. Step 3: Cross multiply
    5,590.70x = 7,715.15 × 3,072.96
  4. Step 4: Simplify right side
    5,590.70x = 23,708,331.98
  5. Step 5: Solve for x
    x = 23,708,331.98/5,590.70
  6. Step 6: Final answer
    x = 4,240.68

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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.