Home / 13,279.90-18,326.10-7,311.44

Finding the Fourth Proportional to 13,279.90, 18,326.10 and 7,311.44

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Solution

The fourth proportional to 13,279.90, 18,326.10 and 7,311.44 is: 10,089.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.90 : 18,326.10 = 7,311.44 : x
  2. Step 2: Convert to fraction form
    13,279.90/18,326.10 = 7,311.44/x
  3. Step 3: Cross multiply
    13,279.90x = 18,326.10 × 7,311.44
  4. Step 4: Simplify right side
    13,279.90x = 133,990,180.58
  5. Step 5: Solve for x
    x = 133,990,180.58/13,279.90
  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.