Home / 12,825.72-19,267.78-9,278.78

Finding the Fourth Proportional to 12,825.72, 19,267.78 and 9,278.78

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Solution

The fourth proportional to 12,825.72, 19,267.78 and 9,278.78 is: 13,939.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,825.72 : 19,267.78 = 9,278.78 : x
  2. Step 2: Convert to fraction form
    12,825.72/19,267.78 = 9,278.78/x
  3. Step 3: Cross multiply
    12,825.72x = 19,267.78 × 9,278.78
  4. Step 4: Simplify right side
    12,825.72x = 178,781,516.68
  5. Step 5: Solve for x
    x = 178,781,516.68/12,825.72
  6. Step 6: Final answer
    x = 13,939.30

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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.