Home / 7,020.78-9,688.32-3,876.36

Finding the Fourth Proportional to 7,020.78, 9,688.32 and 3,876.36

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Solution

The fourth proportional to 7,020.78, 9,688.32 and 3,876.36 is: 5,349.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020.78 : 9,688.32 = 3,876.36 : x
  2. Step 2: Convert to fraction form
    7,020.78/9,688.32 = 3,876.36/x
  3. Step 3: Cross multiply
    7,020.78x = 9,688.32 × 3,876.36
  4. Step 4: Simplify right side
    7,020.78x = 37,555,416.12
  5. Step 5: Solve for x
    x = 37,555,416.12/7,020.78
  6. Step 6: Final answer
    x = 5,349.18

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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.