Home / 21,006.81-28,988.82-11,575.17

Finding the Fourth Proportional to 21,006.81, 28,988.82 and 11,575.17

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Solution

The fourth proportional to 21,006.81, 28,988.82 and 11,575.17 is: 15,973.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.81 : 28,988.82 = 11,575.17 : x
  2. Step 2: Convert to fraction form
    21,006.81/28,988.82 = 11,575.17/x
  3. Step 3: Cross multiply
    21,006.81x = 28,988.82 × 11,575.17
  4. Step 4: Simplify right side
    21,006.81x = 335,550,519.60
  5. Step 5: Solve for x
    x = 335,550,519.60/21,006.81
  6. Step 6: Final answer
    x = 15,973.42

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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.