Home / 12,279.75-16,946.19-6,690.75

Finding the Fourth Proportional to 12,279.75, 16,946.19 and 6,690.75

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Solution

The fourth proportional to 12,279.75, 16,946.19 and 6,690.75 is: 9,233.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.75 : 16,946.19 = 6,690.75 : x
  2. Step 2: Convert to fraction form
    12,279.75/16,946.19 = 6,690.75/x
  3. Step 3: Cross multiply
    12,279.75x = 16,946.19 × 6,690.75
  4. Step 4: Simplify right side
    12,279.75x = 113,382,720.74
  5. Step 5: Solve for x
    x = 113,382,720.74/12,279.75
  6. Step 6: Final answer
    x = 9,233.31

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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.