Home / 20,517.96-30,766.40-9,415.09

Finding the Fourth Proportional to 20,517.96, 30,766.40 and 9,415.09

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Solution

The fourth proportional to 20,517.96, 30,766.40 and 9,415.09 is: 14,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.96 : 30,766.40 = 9,415.09 : x
  2. Step 2: Convert to fraction form
    20,517.96/30,766.40 = 9,415.09/x
  3. Step 3: Cross multiply
    20,517.96x = 30,766.40 × 9,415.09
  4. Step 4: Simplify right side
    20,517.96x = 289,668,424.98
  5. Step 5: Solve for x
    x = 289,668,424.98/20,517.96
  6. Step 6: Final answer
    x = 14,117.80

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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.