Home / 20,640.11-28,492.07-13,934.82

Finding the Fourth Proportional to 20,640.11, 28,492.07 and 13,934.82

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Solution

The fourth proportional to 20,640.11, 28,492.07 and 13,934.82 is: 19,235.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.11 : 28,492.07 = 13,934.82 : x
  2. Step 2: Convert to fraction form
    20,640.11/28,492.07 = 13,934.82/x
  3. Step 3: Cross multiply
    20,640.11x = 28,492.07 × 13,934.82
  4. Step 4: Simplify right side
    20,640.11x = 397,031,654.74
  5. Step 5: Solve for x
    x = 397,031,654.74/20,640.11
  6. Step 6: Final answer
    x = 19,235.93

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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.