Home / 13,279.13-18,326.01-7,311.05

Finding the Fourth Proportional to 13,279.13, 18,326.01 and 7,311.05

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Solution

The fourth proportional to 13,279.13, 18,326.01 and 7,311.05 is: 10,089.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.13 : 18,326.01 = 7,311.05 : x
  2. Step 2: Convert to fraction form
    13,279.13/18,326.01 = 7,311.05/x
  3. Step 3: Cross multiply
    13,279.13x = 18,326.01 × 7,311.05
  4. Step 4: Simplify right side
    13,279.13x = 133,982,375.41
  5. Step 5: Solve for x
    x = 133,982,375.41/13,279.13
  6. Step 6: Final answer
    x = 10,089.70

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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.