Home / 7,020.78-9,688.68-3,876.96

Finding the Fourth Proportional to 7,020.78, 9,688.68 and 3,876.96

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Solution

The fourth proportional to 7,020.78, 9,688.68 and 3,876.96 is: 5,350.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020.78 : 9,688.68 = 3,876.96 : x
  2. Step 2: Convert to fraction form
    7,020.78/9,688.68 = 3,876.96/x
  3. Step 3: Cross multiply
    7,020.78x = 9,688.68 × 3,876.96
  4. Step 4: Simplify right side
    7,020.78x = 37,562,624.81
  5. Step 5: Solve for x
    x = 37,562,624.81/7,020.78
  6. Step 6: Final answer
    x = 5,350.21

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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.