Home / 21,456.31-29,611.46-11,897.15

Finding the Fourth Proportional to 21,456.31, 29,611.46 and 11,897.15

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Solution

The fourth proportional to 21,456.31, 29,611.46 and 11,897.15 is: 16,419.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.31 : 29,611.46 = 11,897.15 : x
  2. Step 2: Convert to fraction form
    21,456.31/29,611.46 = 11,897.15/x
  3. Step 3: Cross multiply
    21,456.31x = 29,611.46 × 11,897.15
  4. Step 4: Simplify right side
    21,456.31x = 352,291,773.80
  5. Step 5: Solve for x
    x = 352,291,773.80/21,456.31
  6. Step 6: Final answer
    x = 16,419.03

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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.