Home / 21,053.30-31,616.40-11,211.80

Finding the Fourth Proportional to 21,053.30, 31,616.40 and 11,211.80

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Solution

The fourth proportional to 21,053.30, 31,616.40 and 11,211.80 is: 16,837.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.30 : 31,616.40 = 11,211.80 : x
  2. Step 2: Convert to fraction form
    21,053.30/31,616.40 = 11,211.80/x
  3. Step 3: Cross multiply
    21,053.30x = 31,616.40 × 11,211.80
  4. Step 4: Simplify right side
    21,053.30x = 354,476,753.52
  5. Step 5: Solve for x
    x = 354,476,753.52/21,053.30
  6. Step 6: Final answer
    x = 16,837.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.