Home / 21,013.40-28,998.62-11,581.96

Finding the Fourth Proportional to 21,013.40, 28,998.62 and 11,581.96

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Solution

The fourth proportional to 21,013.40, 28,998.62 and 11,581.96 is: 15,983.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.40 : 28,998.62 = 11,581.96 : x
  2. Step 2: Convert to fraction form
    21,013.40/28,998.62 = 11,581.96/x
  3. Step 3: Cross multiply
    21,013.40x = 28,998.62 × 11,581.96
  4. Step 4: Simplify right side
    21,013.40x = 335,860,813.35
  5. Step 5: Solve for x
    x = 335,860,813.35/21,013.40
  6. Step 6: Final answer
    x = 15,983.18

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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.