Home / 20,428.45-28,188.19-11,474.24

Finding the Fourth Proportional to 20,428.45, 28,188.19 and 11,474.24

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Solution

The fourth proportional to 20,428.45, 28,188.19 and 11,474.24 is: 15,832.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.45 : 28,188.19 = 11,474.24 : x
  2. Step 2: Convert to fraction form
    20,428.45/28,188.19 = 11,474.24/x
  3. Step 3: Cross multiply
    20,428.45x = 28,188.19 × 11,474.24
  4. Step 4: Simplify right side
    20,428.45x = 323,437,887.60
  5. Step 5: Solve for x
    x = 323,437,887.60/20,428.45
  6. Step 6: Final answer
    x = 15,832.72

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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.