Home / 19,971.50-27,560.67-11,139.50

Finding the Fourth Proportional to 19,971.50, 27,560.67 and 11,139.50

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Solution

The fourth proportional to 19,971.50, 27,560.67 and 11,139.50 is: 15,372.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,971.50 : 27,560.67 = 11,139.50 : x
  2. Step 2: Convert to fraction form
    19,971.50/27,560.67 = 11,139.50/x
  3. Step 3: Cross multiply
    19,971.50x = 27,560.67 × 11,139.50
  4. Step 4: Simplify right side
    19,971.50x = 307,012,083.47
  5. Step 5: Solve for x
    x = 307,012,083.47/19,971.50
  6. Step 6: Final answer
    x = 15,372.51

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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.