Home / 13,279.95-18,326.42-7,311.33

Finding the Fourth Proportional to 13,279.95, 18,326.42 and 7,311.33

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Solution

The fourth proportional to 13,279.95, 18,326.42 and 7,311.33 is: 10,089.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.95 : 18,326.42 = 7,311.33 : x
  2. Step 2: Convert to fraction form
    13,279.95/18,326.42 = 7,311.33/x
  3. Step 3: Cross multiply
    13,279.95x = 18,326.42 × 7,311.33
  4. Step 4: Simplify right side
    13,279.95x = 133,990,467.78
  5. Step 5: Solve for x
    x = 133,990,467.78/13,279.95
  6. Step 6: Final answer
    x = 10,089.68

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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.