Home / 13,279.62-18,326.31-7,311.75

Finding the Fourth Proportional to 13,279.62, 18,326.31 and 7,311.75

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Solution

The fourth proportional to 13,279.62, 18,326.31 and 7,311.75 is: 10,090.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.62 : 18,326.31 = 7,311.75 : x
  2. Step 2: Convert to fraction form
    13,279.62/18,326.31 = 7,311.75/x
  3. Step 3: Cross multiply
    13,279.62x = 18,326.31 × 7,311.75
  4. Step 4: Simplify right side
    13,279.62x = 133,997,397.14
  5. Step 5: Solve for x
    x = 133,997,397.14/13,279.62
  6. Step 6: Final answer
    x = 10,090.45

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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.