Home / 21,143.07-31,719.51-7,104.96

Finding the Fourth Proportional to 21,143.07, 31,719.51 and 7,104.96

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Solution

The fourth proportional to 21,143.07, 31,719.51 and 7,104.96 is: 10,659.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.07 : 31,719.51 = 7,104.96 : x
  2. Step 2: Convert to fraction form
    21,143.07/31,719.51 = 7,104.96/x
  3. Step 3: Cross multiply
    21,143.07x = 31,719.51 × 7,104.96
  4. Step 4: Simplify right side
    21,143.07x = 225,365,849.77
  5. Step 5: Solve for x
    x = 225,365,849.77/21,143.07
  6. Step 6: Final answer
    x = 10,659.09

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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.