Home / 20,717.47-31,070.03-7,388.11

Finding the Fourth Proportional to 20,717.47, 31,070.03 and 7,388.11

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Solution

The fourth proportional to 20,717.47, 31,070.03 and 7,388.11 is: 11,079.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.47 : 31,070.03 = 7,388.11 : x
  2. Step 2: Convert to fraction form
    20,717.47/31,070.03 = 7,388.11/x
  3. Step 3: Cross multiply
    20,717.47x = 31,070.03 × 7,388.11
  4. Step 4: Simplify right side
    20,717.47x = 229,548,799.34
  5. Step 5: Solve for x
    x = 229,548,799.34/20,717.47
  6. Step 6: Final answer
    x = 11,079.96

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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.