Home / 20,915.82-31,365.56-7,585.65

Finding the Fourth Proportional to 20,915.82, 31,365.56 and 7,585.65

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Solution

The fourth proportional to 20,915.82, 31,365.56 and 7,585.65 is: 11,375.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.82 : 31,365.56 = 7,585.65 : x
  2. Step 2: Convert to fraction form
    20,915.82/31,365.56 = 7,585.65/x
  3. Step 3: Cross multiply
    20,915.82x = 31,365.56 × 7,585.65
  4. Step 4: Simplify right side
    20,915.82x = 237,928,160.21
  5. Step 5: Solve for x
    x = 237,928,160.21/20,915.82
  6. Step 6: Final answer
    x = 11,375.51

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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.