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Finding the Fourth Proportional to 15,815.80, 21,832.78 and 9,444.60

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Solution

The fourth proportional to 15,815.80, 21,832.78 and 9,444.60 is: 13,037.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,815.80 : 21,832.78 = 9,444.60 : x
  2. Step 2: Convert to fraction form
    15,815.80/21,832.78 = 9,444.60/x
  3. Step 3: Cross multiply
    15,815.80x = 21,832.78 × 9,444.60
  4. Step 4: Simplify right side
    15,815.80x = 206,201,873.99
  5. Step 5: Solve for x
    x = 206,201,873.99/15,815.80
  6. Step 6: Final answer
    x = 13,037.71

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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.