Home / 20,918.94-28,868.25-11,966.82

Finding the Fourth Proportional to 20,918.94, 28,868.25 and 11,966.82

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Solution

The fourth proportional to 20,918.94, 28,868.25 and 11,966.82 is: 16,514.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.94 : 28,868.25 = 11,966.82 : x
  2. Step 2: Convert to fraction form
    20,918.94/28,868.25 = 11,966.82/x
  3. Step 3: Cross multiply
    20,918.94x = 28,868.25 × 11,966.82
  4. Step 4: Simplify right side
    20,918.94x = 345,461,151.47
  5. Step 5: Solve for x
    x = 345,461,151.47/20,918.94
  6. Step 6: Final answer
    x = 16,514.28

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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.