Home / 20,965.88-28,944.90-13,901.90

Finding the Fourth Proportional to 20,965.88, 28,944.90 and 13,901.90

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Solution

The fourth proportional to 20,965.88, 28,944.90 and 13,901.90 is: 19,192.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.88 : 28,944.90 = 13,901.90 : x
  2. Step 2: Convert to fraction form
    20,965.88/28,944.90 = 13,901.90/x
  3. Step 3: Cross multiply
    20,965.88x = 28,944.90 × 13,901.90
  4. Step 4: Simplify right side
    20,965.88x = 402,389,105.31
  5. Step 5: Solve for x
    x = 402,389,105.31/20,965.88
  6. Step 6: Final answer
    x = 19,192.57

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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.