Home / 21,122.70-29,149.47-11,691.06

Finding the Fourth Proportional to 21,122.70, 29,149.47 and 11,691.06

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Solution

The fourth proportional to 21,122.70, 29,149.47 and 11,691.06 is: 16,133.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.70 : 29,149.47 = 11,691.06 : x
  2. Step 2: Convert to fraction form
    21,122.70/29,149.47 = 11,691.06/x
  3. Step 3: Cross multiply
    21,122.70x = 29,149.47 × 11,691.06
  4. Step 4: Simplify right side
    21,122.70x = 340,788,202.74
  5. Step 5: Solve for x
    x = 340,788,202.74/21,122.70
  6. Step 6: Final answer
    x = 16,133.74

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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.