Home / 20,328.19-28,054.13-11,375.50

Finding the Fourth Proportional to 20,328.19, 28,054.13 and 11,375.50

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Solution

The fourth proportional to 20,328.19, 28,054.13 and 11,375.50 is: 15,698.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.19 : 28,054.13 = 11,375.50 : x
  2. Step 2: Convert to fraction form
    20,328.19/28,054.13 = 11,375.50/x
  3. Step 3: Cross multiply
    20,328.19x = 28,054.13 × 11,375.50
  4. Step 4: Simplify right side
    20,328.19x = 319,129,755.82
  5. Step 5: Solve for x
    x = 319,129,755.82/20,328.19
  6. Step 6: Final answer
    x = 15,698.88

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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.