Home / 21,691.21-29,934.09-12,741.58

Finding the Fourth Proportional to 21,691.21, 29,934.09 and 12,741.58

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Solution

The fourth proportional to 21,691.21, 29,934.09 and 12,741.58 is: 17,583.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,691.21 : 29,934.09 = 12,741.58 : x
  2. Step 2: Convert to fraction form
    21,691.21/29,934.09 = 12,741.58/x
  3. Step 3: Cross multiply
    21,691.21x = 29,934.09 × 12,741.58
  4. Step 4: Simplify right side
    21,691.21x = 381,407,602.46
  5. Step 5: Solve for x
    x = 381,407,602.46/21,691.21
  6. Step 6: Final answer
    x = 17,583.51

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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.