Home / 20,281.52-27,991.32-11,900.72

Finding the Fourth Proportional to 20,281.52, 27,991.32 and 11,900.72

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Solution

The fourth proportional to 20,281.52, 27,991.32 and 11,900.72 is: 16,424.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.52 : 27,991.32 = 11,900.72 : x
  2. Step 2: Convert to fraction form
    20,281.52/27,991.32 = 11,900.72/x
  3. Step 3: Cross multiply
    20,281.52x = 27,991.32 × 11,900.72
  4. Step 4: Simplify right side
    20,281.52x = 333,116,861.75
  5. Step 5: Solve for x
    x = 333,116,861.75/20,281.52
  6. Step 6: Final answer
    x = 16,424.65

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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.