Home / 21,166.80-31,756.82-12,742.53

Finding the Fourth Proportional to 21,166.80, 31,756.82 and 12,742.53

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Solution

The fourth proportional to 21,166.80, 31,756.82 and 12,742.53 is: 19,117.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.80 : 31,756.82 = 12,742.53 : x
  2. Step 2: Convert to fraction form
    21,166.80/31,756.82 = 12,742.53/x
  3. Step 3: Cross multiply
    21,166.80x = 31,756.82 × 12,742.53
  4. Step 4: Simplify right side
    21,166.80x = 404,662,167.84
  5. Step 5: Solve for x
    x = 404,662,167.84/21,166.80
  6. Step 6: Final answer
    x = 19,117.78

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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.