Home / 21,100.20-29,116.08-11,668.20

Finding the Fourth Proportional to 21,100.20, 29,116.08 and 11,668.20

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Solution

The fourth proportional to 21,100.20, 29,116.08 and 11,668.20 is: 16,100.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.20 : 29,116.08 = 11,668.20 : x
  2. Step 2: Convert to fraction form
    21,100.20/29,116.08 = 11,668.20/x
  3. Step 3: Cross multiply
    21,100.20x = 29,116.08 × 11,668.20
  4. Step 4: Simplify right side
    21,100.20x = 339,732,244.66
  5. Step 5: Solve for x
    x = 339,732,244.66/21,100.20
  6. Step 6: Final answer
    x = 16,100.90

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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.