Home / 12,862.78-19,299.30-6,287.20

Finding the Fourth Proportional to 12,862.78, 19,299.30 and 6,287.20

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Solution

The fourth proportional to 12,862.78, 19,299.30 and 6,287.20 is: 9,433.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,862.78 : 19,299.30 = 6,287.20 : x
  2. Step 2: Convert to fraction form
    12,862.78/19,299.30 = 6,287.20/x
  3. Step 3: Cross multiply
    12,862.78x = 19,299.30 × 6,287.20
  4. Step 4: Simplify right side
    12,862.78x = 121,338,558.96
  5. Step 5: Solve for x
    x = 121,338,558.96/12,862.78
  6. Step 6: Final answer
    x = 9,433.31

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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.