Home / 21,101.23-29,121.15-12,151.09

Finding the Fourth Proportional to 21,101.23, 29,121.15 and 12,151.09

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Solution

The fourth proportional to 21,101.23, 29,121.15 and 12,151.09 is: 16,769.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.23 : 29,121.15 = 12,151.09 : x
  2. Step 2: Convert to fraction form
    21,101.23/29,121.15 = 12,151.09/x
  3. Step 3: Cross multiply
    21,101.23x = 29,121.15 × 12,151.09
  4. Step 4: Simplify right side
    21,101.23x = 353,853,714.55
  5. Step 5: Solve for x
    x = 353,853,714.55/21,101.23
  6. Step 6: Final answer
    x = 16,769.34

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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.