Home / 21,072.78-31,602.42-11,717.28

Finding the Fourth Proportional to 21,072.78, 31,602.42 and 11,717.28

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Solution

The fourth proportional to 21,072.78, 31,602.42 and 11,717.28 is: 17,572.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.78 : 31,602.42 = 11,717.28 : x
  2. Step 2: Convert to fraction form
    21,072.78/31,602.42 = 11,717.28/x
  3. Step 3: Cross multiply
    21,072.78x = 31,602.42 × 11,717.28
  4. Step 4: Simplify right side
    21,072.78x = 370,294,403.82
  5. Step 5: Solve for x
    x = 370,294,403.82/21,072.78
  6. Step 6: Final answer
    x = 17,572.17

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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.