Home / 5,181.96-7,772.80-1,286.32

Finding the Fourth Proportional to 5,181.96, 7,772.80 and 1,286.32

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Solution

The fourth proportional to 5,181.96, 7,772.80 and 1,286.32 is: 1,929.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.96 : 7,772.80 = 1,286.32 : x
  2. Step 2: Convert to fraction form
    5,181.96/7,772.80 = 1,286.32/x
  3. Step 3: Cross multiply
    5,181.96x = 7,772.80 × 1,286.32
  4. Step 4: Simplify right side
    5,181.96x = 9,998,308.10
  5. Step 5: Solve for x
    x = 9,998,308.10/5,181.96
  6. Step 6: Final answer
    x = 1,929.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.