Home / 21,207.54-31,793.06-8,719.76

Finding the Fourth Proportional to 21,207.54, 31,793.06 and 8,719.76

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Solution

The fourth proportional to 21,207.54, 31,793.06 and 8,719.76 is: 13,072.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.54 : 31,793.06 = 8,719.76 : x
  2. Step 2: Convert to fraction form
    21,207.54/31,793.06 = 8,719.76/x
  3. Step 3: Cross multiply
    21,207.54x = 31,793.06 × 8,719.76
  4. Step 4: Simplify right side
    21,207.54x = 277,227,852.87
  5. Step 5: Solve for x
    x = 277,227,852.87/21,207.54
  6. Step 6: Final answer
    x = 13,072.14

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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.