Home / 20,729.05-31,098.01-6,689.88

Finding the Fourth Proportional to 20,729.05, 31,098.01 and 6,689.88

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Solution

The fourth proportional to 20,729.05, 31,098.01 and 6,689.88 is: 10,036.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.05 : 31,098.01 = 6,689.88 : x
  2. Step 2: Convert to fraction form
    20,729.05/31,098.01 = 6,689.88/x
  3. Step 3: Cross multiply
    20,729.05x = 31,098.01 × 6,689.88
  4. Step 4: Simplify right side
    20,729.05x = 208,041,955.14
  5. Step 5: Solve for x
    x = 208,041,955.14/20,729.05
  6. Step 6: Final answer
    x = 10,036.25

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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.