Home / 20,854.55-31,286.69-6,815.22

Finding the Fourth Proportional to 20,854.55, 31,286.69 and 6,815.22

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Solution

The fourth proportional to 20,854.55, 31,286.69 and 6,815.22 is: 10,224.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.55 : 31,286.69 = 6,815.22 : x
  2. Step 2: Convert to fraction form
    20,854.55/31,286.69 = 6,815.22/x
  3. Step 3: Cross multiply
    20,854.55x = 31,286.69 × 6,815.22
  4. Step 4: Simplify right side
    20,854.55x = 213,225,641.35
  5. Step 5: Solve for x
    x = 213,225,641.35/20,854.55
  6. Step 6: Final answer
    x = 10,224.42

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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.