Home / 20,585.25-30,919.20-12,281.47

Finding the Fourth Proportional to 20,585.25, 30,919.20 and 12,281.47

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Solution

The fourth proportional to 20,585.25, 30,919.20 and 12,281.47 is: 18,446.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.25 : 30,919.20 = 12,281.47 : x
  2. Step 2: Convert to fraction form
    20,585.25/30,919.20 = 12,281.47/x
  3. Step 3: Cross multiply
    20,585.25x = 30,919.20 × 12,281.47
  4. Step 4: Simplify right side
    20,585.25x = 379,733,072.63
  5. Step 5: Solve for x
    x = 379,733,072.63/20,585.25
  6. Step 6: Final answer
    x = 18,446.86

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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.