Home / 20,328.45-28,054.43-11,375.87

Finding the Fourth Proportional to 20,328.45, 28,054.43 and 11,375.87

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Solution

The fourth proportional to 20,328.45, 28,054.43 and 11,375.87 is: 15,699.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.45 : 28,054.43 = 11,375.87 : x
  2. Step 2: Convert to fraction form
    20,328.45/28,054.43 = 11,375.87/x
  3. Step 3: Cross multiply
    20,328.45x = 28,054.43 × 11,375.87
  4. Step 4: Simplify right side
    20,328.45x = 319,143,499.32
  5. Step 5: Solve for x
    x = 319,143,499.32/20,328.45
  6. Step 6: Final answer
    x = 15,699.36

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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.