Home / 21,342.42-29,453.81-11,911.59

Finding the Fourth Proportional to 21,342.42, 29,453.81 and 11,911.59

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Solution

The fourth proportional to 21,342.42, 29,453.81 and 11,911.59 is: 16,438.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.42 : 29,453.81 = 11,911.59 : x
  2. Step 2: Convert to fraction form
    21,342.42/29,453.81 = 11,911.59/x
  3. Step 3: Cross multiply
    21,342.42x = 29,453.81 × 11,911.59
  4. Step 4: Simplify right side
    21,342.42x = 350,841,708.66
  5. Step 5: Solve for x
    x = 350,841,708.66/21,342.42
  6. Step 6: Final answer
    x = 16,438.70

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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.