Home / 20,925.85-31,388.78-9,236.74

Finding the Fourth Proportional to 20,925.85, 31,388.78 and 9,236.74

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Solution

The fourth proportional to 20,925.85, 31,388.78 and 9,236.74 is: 13,855.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.85 : 31,388.78 = 9,236.74 : x
  2. Step 2: Convert to fraction form
    20,925.85/31,388.78 = 9,236.74/x
  3. Step 3: Cross multiply
    20,925.85x = 31,388.78 × 9,236.74
  4. Step 4: Simplify right side
    20,925.85x = 289,930,103.64
  5. Step 5: Solve for x
    x = 289,930,103.64/20,925.85
  6. Step 6: Final answer
    x = 13,855.12

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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.