Home / 21,223.77-31,815.87-7,174.03

Finding the Fourth Proportional to 21,223.77, 31,815.87 and 7,174.03

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Solution

The fourth proportional to 21,223.77, 31,815.87 and 7,174.03 is: 10,754.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.77 : 31,815.87 = 7,174.03 : x
  2. Step 2: Convert to fraction form
    21,223.77/31,815.87 = 7,174.03/x
  3. Step 3: Cross multiply
    21,223.77x = 31,815.87 × 7,174.03
  4. Step 4: Simplify right side
    21,223.77x = 228,247,889.76
  5. Step 5: Solve for x
    x = 228,247,889.76/21,223.77
  6. Step 6: Final answer
    x = 10,754.35

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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.