Home / 20,995.08-28,972.80-11,563.44

Finding the Fourth Proportional to 20,995.08, 28,972.80 and 11,563.44

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Solution

The fourth proportional to 20,995.08, 28,972.80 and 11,563.44 is: 15,957.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.08 : 28,972.80 = 11,563.44 : x
  2. Step 2: Convert to fraction form
    20,995.08/28,972.80 = 11,563.44/x
  3. Step 3: Cross multiply
    20,995.08x = 28,972.80 × 11,563.44
  4. Step 4: Simplify right side
    20,995.08x = 335,025,234.43
  5. Step 5: Solve for x
    x = 335,025,234.43/20,995.08
  6. Step 6: Final answer
    x = 15,957.32

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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.