Home / 21,072.45-31,599.15-11,209.62

Finding the Fourth Proportional to 21,072.45, 31,599.15 and 11,209.62

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Solution

The fourth proportional to 21,072.45, 31,599.15 and 11,209.62 is: 16,809.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.45 : 31,599.15 = 11,209.62 : x
  2. Step 2: Convert to fraction form
    21,072.45/31,599.15 = 11,209.62/x
  3. Step 3: Cross multiply
    21,072.45x = 31,599.15 × 11,209.62
  4. Step 4: Simplify right side
    21,072.45x = 354,214,463.82
  5. Step 5: Solve for x
    x = 354,214,463.82/21,072.45
  6. Step 6: Final answer
    x = 16,809.36

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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.