Home / 21,331.89-29,438.64-11,900.25

Finding the Fourth Proportional to 21,331.89, 29,438.64 and 11,900.25

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Solution

The fourth proportional to 21,331.89, 29,438.64 and 11,900.25 is: 16,422.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.89 : 29,438.64 = 11,900.25 : x
  2. Step 2: Convert to fraction form
    21,331.89/29,438.64 = 11,900.25/x
  3. Step 3: Cross multiply
    21,331.89x = 29,438.64 × 11,900.25
  4. Step 4: Simplify right side
    21,331.89x = 350,327,175.66
  5. Step 5: Solve for x
    x = 350,327,175.66/21,331.89
  6. Step 6: Final answer
    x = 16,422.70

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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.