Home / 5,181.78-7,772.70-2,988.60

Finding the Fourth Proportional to 5,181.78, 7,772.70 and 2,988.60

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Solution

The fourth proportional to 5,181.78, 7,772.70 and 2,988.60 is: 4,482.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.78 : 7,772.70 = 2,988.60 : x
  2. Step 2: Convert to fraction form
    5,181.78/7,772.70 = 2,988.60/x
  3. Step 3: Cross multiply
    5,181.78x = 7,772.70 × 2,988.60
  4. Step 4: Simplify right side
    5,181.78x = 23,229,491.22
  5. Step 5: Solve for x
    x = 23,229,491.22/5,181.78
  6. Step 6: Final answer
    x = 4,482.92

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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.