Home / 20,376.42-28,120.50-11,424.84

Finding the Fourth Proportional to 20,376.42, 28,120.50 and 11,424.84

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Solution

The fourth proportional to 20,376.42, 28,120.50 and 11,424.84 is: 15,766.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.42 : 28,120.50 = 11,424.84 : x
  2. Step 2: Convert to fraction form
    20,376.42/28,120.50 = 11,424.84/x
  3. Step 3: Cross multiply
    20,376.42x = 28,120.50 × 11,424.84
  4. Step 4: Simplify right side
    20,376.42x = 321,272,213.22
  5. Step 5: Solve for x
    x = 321,272,213.22/20,376.42
  6. Step 6: Final answer
    x = 15,766.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.