Home / 21,143.22-29,177.01-11,711.58

Finding the Fourth Proportional to 21,143.22, 29,177.01 and 11,711.58

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Solution

The fourth proportional to 21,143.22, 29,177.01 and 11,711.58 is: 16,161.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.22 : 29,177.01 = 11,711.58 : x
  2. Step 2: Convert to fraction form
    21,143.22/29,177.01 = 11,711.58/x
  3. Step 3: Cross multiply
    21,143.22x = 29,177.01 × 11,711.58
  4. Step 4: Simplify right side
    21,143.22x = 341,708,886.78
  5. Step 5: Solve for x
    x = 341,708,886.78/21,143.22
  6. Step 6: Final answer
    x = 16,161.63

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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.