Home / 21,100.10-29,117.78-11,668.66

Finding the Fourth Proportional to 21,100.10, 29,117.78 and 11,668.66

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Solution

The fourth proportional to 21,100.10, 29,117.78 and 11,668.66 is: 16,102.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.10 : 29,117.78 = 11,668.66 : x
  2. Step 2: Convert to fraction form
    21,100.10/29,117.78 = 11,668.66/x
  3. Step 3: Cross multiply
    21,100.10x = 29,117.78 × 11,668.66
  4. Step 4: Simplify right side
    21,100.10x = 339,765,387.39
  5. Step 5: Solve for x
    x = 339,765,387.39/21,100.10
  6. Step 6: Final answer
    x = 16,102.55

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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.