Home / 20,753.08-28,639.14-11,321.68

Finding the Fourth Proportional to 20,753.08, 28,639.14 and 11,321.68

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Solution

The fourth proportional to 20,753.08, 28,639.14 and 11,321.68 is: 15,623.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.08 : 28,639.14 = 11,321.68 : x
  2. Step 2: Convert to fraction form
    20,753.08/28,639.14 = 11,321.68/x
  3. Step 3: Cross multiply
    20,753.08x = 28,639.14 × 11,321.68
  4. Step 4: Simplify right side
    20,753.08x = 324,243,178.56
  5. Step 5: Solve for x
    x = 324,243,178.56/20,753.08
  6. Step 6: Final answer
    x = 15,623.86

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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.