Home / 20,715.21-31,068.12-6,672.54

Finding the Fourth Proportional to 20,715.21, 31,068.12 and 6,672.54

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Solution

The fourth proportional to 20,715.21, 31,068.12 and 6,672.54 is: 10,007.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.21 : 31,068.12 = 6,672.54 : x
  2. Step 2: Convert to fraction form
    20,715.21/31,068.12 = 6,672.54/x
  3. Step 3: Cross multiply
    20,715.21x = 31,068.12 × 6,672.54
  4. Step 4: Simplify right side
    20,715.21x = 207,303,273.42
  5. Step 5: Solve for x
    x = 207,303,273.42/20,715.21
  6. Step 6: Final answer
    x = 10,007.30

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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.