Home / 21,427.30-29,569.53-11,995.30

Finding the Fourth Proportional to 21,427.30, 29,569.53 and 11,995.30

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Solution

The fourth proportional to 21,427.30, 29,569.53 and 11,995.30 is: 16,553.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,427.30 : 29,569.53 = 11,995.30 : x
  2. Step 2: Convert to fraction form
    21,427.30/29,569.53 = 11,995.30/x
  3. Step 3: Cross multiply
    21,427.30x = 29,569.53 × 11,995.30
  4. Step 4: Simplify right side
    21,427.30x = 354,695,383.21
  5. Step 5: Solve for x
    x = 354,695,383.21/21,427.30
  6. Step 6: Final answer
    x = 16,553.43

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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.