Home / 20,384.20-28,129.50-11,433.16

Finding the Fourth Proportional to 20,384.20, 28,129.50 and 11,433.16

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Solution

The fourth proportional to 20,384.20, 28,129.50 and 11,433.16 is: 15,777.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.20 : 28,129.50 = 11,433.16 : x
  2. Step 2: Convert to fraction form
    20,384.20/28,129.50 = 11,433.16/x
  3. Step 3: Cross multiply
    20,384.20x = 28,129.50 × 11,433.16
  4. Step 4: Simplify right side
    20,384.20x = 321,609,074.22
  5. Step 5: Solve for x
    x = 321,609,074.22/20,384.20
  6. Step 6: Final answer
    x = 15,777.37

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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.