Home / 12,278.08-16,944.16-6,689.28

Finding the Fourth Proportional to 12,278.08, 16,944.16 and 6,689.28

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Solution

The fourth proportional to 12,278.08, 16,944.16 and 6,689.28 is: 9,231.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.08 : 16,944.16 = 6,689.28 : x
  2. Step 2: Convert to fraction form
    12,278.08/16,944.16 = 6,689.28/x
  3. Step 3: Cross multiply
    12,278.08x = 16,944.16 × 6,689.28
  4. Step 4: Simplify right side
    12,278.08x = 113,344,230.60
  5. Step 5: Solve for x
    x = 113,344,230.60/12,278.08
  6. Step 6: Final answer
    x = 9,231.43

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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.