Home / 12,279.13-16,945.31-6,690.49

Finding the Fourth Proportional to 12,279.13, 16,945.31 and 6,690.49

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Solution

The fourth proportional to 12,279.13, 16,945.31 and 6,690.49 is: 9,232.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.13 : 16,945.31 = 6,690.49 : x
  2. Step 2: Convert to fraction form
    12,279.13/16,945.31 = 6,690.49/x
  3. Step 3: Cross multiply
    12,279.13x = 16,945.31 × 6,690.49
  4. Step 4: Simplify right side
    12,279.13x = 113,372,393.65
  5. Step 5: Solve for x
    x = 113,372,393.65/12,279.13
  6. Step 6: Final answer
    x = 9,232.93

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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.