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Finding the Fourth Proportional to 15,739.20, 21,717.83 and 9,025.11

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Solution

The fourth proportional to 15,739.20, 21,717.83 and 9,025.11 is: 12,453.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.20 : 21,717.83 = 9,025.11 : x
  2. Step 2: Convert to fraction form
    15,739.20/21,717.83 = 9,025.11/x
  3. Step 3: Cross multiply
    15,739.20x = 21,717.83 × 9,025.11
  4. Step 4: Simplify right side
    15,739.20x = 196,005,759.59
  5. Step 5: Solve for x
    x = 196,005,759.59/15,739.20
  6. Step 6: Final answer
    x = 12,453.35

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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.