Home / 20,731.14-31,095.90-6,690.60

Finding the Fourth Proportional to 20,731.14, 31,095.90 and 6,690.60

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Solution

The fourth proportional to 20,731.14, 31,095.90 and 6,690.60 is: 10,035.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.14 : 31,095.90 = 6,690.60 : x
  2. Step 2: Convert to fraction form
    20,731.14/31,095.90 = 6,690.60/x
  3. Step 3: Cross multiply
    20,731.14x = 31,095.90 × 6,690.60
  4. Step 4: Simplify right side
    20,731.14x = 208,050,228.54
  5. Step 5: Solve for x
    x = 208,050,228.54/20,731.14
  6. Step 6: Final answer
    x = 10,035.64

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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.