Home / 15,379.14-21,223.20-8,305.56

Finding the Fourth Proportional to 15,379.14, 21,223.20 and 8,305.56

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Solution

The fourth proportional to 15,379.14, 21,223.20 and 8,305.56 is: 11,461.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,379.14 : 21,223.20 = 8,305.56 : x
  2. Step 2: Convert to fraction form
    15,379.14/21,223.20 = 8,305.56/x
  3. Step 3: Cross multiply
    15,379.14x = 21,223.20 × 8,305.56
  4. Step 4: Simplify right side
    15,379.14x = 176,270,592.14
  5. Step 5: Solve for x
    x = 176,270,592.14/15,379.14
  6. Step 6: Final answer
    x = 11,461.67

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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.