Home / 20,930.55-31,396.74-10,405.62

Finding the Fourth Proportional to 20,930.55, 31,396.74 and 10,405.62

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Solution

The fourth proportional to 20,930.55, 31,396.74 and 10,405.62 is: 15,608.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.55 : 31,396.74 = 10,405.62 : x
  2. Step 2: Convert to fraction form
    20,930.55/31,396.74 = 10,405.62/x
  3. Step 3: Cross multiply
    20,930.55x = 31,396.74 × 10,405.62
  4. Step 4: Simplify right side
    20,930.55x = 326,702,545.68
  5. Step 5: Solve for x
    x = 326,702,545.68/20,930.55
  6. Step 6: Final answer
    x = 15,608.88

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1.5x scale

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.