Home / 21,073.78-31,603.92-11,718.28

Finding the Fourth Proportional to 21,073.78, 31,603.92 and 11,718.28

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Solution

The fourth proportional to 21,073.78, 31,603.92 and 11,718.28 is: 17,573.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,073.78 : 31,603.92 = 11,718.28 : x
  2. Step 2: Convert to fraction form
    21,073.78/31,603.92 = 11,718.28/x
  3. Step 3: Cross multiply
    21,073.78x = 31,603.92 × 11,718.28
  4. Step 4: Simplify right side
    21,073.78x = 370,343,583.66
  5. Step 5: Solve for x
    x = 370,343,583.66/21,073.78
  6. Step 6: Final answer
    x = 17,573.67

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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.