Home / 13,279.88-18,326.07-7,311.42

Finding the Fourth Proportional to 13,279.88, 18,326.07 and 7,311.42

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Solution

The fourth proportional to 13,279.88, 18,326.07 and 7,311.42 is: 10,089.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.88 : 18,326.07 = 7,311.42 : x
  2. Step 2: Convert to fraction form
    13,279.88/18,326.07 = 7,311.42/x
  3. Step 3: Cross multiply
    13,279.88x = 18,326.07 × 7,311.42
  4. Step 4: Simplify right side
    13,279.88x = 133,989,594.72
  5. Step 5: Solve for x
    x = 133,989,594.72/13,279.88
  6. Step 6: Final answer
    x = 10,089.67

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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.