Home / 21,531.42-29,711.81-11,971.46

Finding the Fourth Proportional to 21,531.42, 29,711.81 and 11,971.46

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Solution

The fourth proportional to 21,531.42, 29,711.81 and 11,971.46 is: 16,519.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.42 : 29,711.81 = 11,971.46 : x
  2. Step 2: Convert to fraction form
    21,531.42/29,711.81 = 11,971.46/x
  3. Step 3: Cross multiply
    21,531.42x = 29,711.81 × 11,971.46
  4. Step 4: Simplify right side
    21,531.42x = 355,693,849.15
  5. Step 5: Solve for x
    x = 355,693,849.15/21,531.42
  6. Step 6: Final answer
    x = 16,519.76

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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.