Home / 21,137.92-31,707.40-7,098.41

Finding the Fourth Proportional to 21,137.92, 31,707.40 and 7,098.41

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Solution

The fourth proportional to 21,137.92, 31,707.40 and 7,098.41 is: 10,647.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.92 : 31,707.40 = 7,098.41 : x
  2. Step 2: Convert to fraction form
    21,137.92/31,707.40 = 7,098.41/x
  3. Step 3: Cross multiply
    21,137.92x = 31,707.40 × 7,098.41
  4. Step 4: Simplify right side
    21,137.92x = 225,072,186.76
  5. Step 5: Solve for x
    x = 225,072,186.76/21,137.92
  6. Step 6: Final answer
    x = 10,647.79

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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.