Home / 20,640.98-28,493.27-13,935.69

Finding the Fourth Proportional to 20,640.98, 28,493.27 and 13,935.69

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Solution

The fourth proportional to 20,640.98, 28,493.27 and 13,935.69 is: 19,237.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.98 : 28,493.27 = 13,935.69 : x
  2. Step 2: Convert to fraction form
    20,640.98/28,493.27 = 13,935.69/x
  3. Step 3: Cross multiply
    20,640.98x = 28,493.27 × 13,935.69
  4. Step 4: Simplify right side
    20,640.98x = 397,073,360.39
  5. Step 5: Solve for x
    x = 397,073,360.39/20,640.98
  6. Step 6: Final answer
    x = 19,237.13

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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.