Home / 15,321.28-21,144.24-8,607.44

Finding the Fourth Proportional to 15,321.28, 21,144.24 and 8,607.44

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Solution

The fourth proportional to 15,321.28, 21,144.24 and 8,607.44 is: 11,878.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.28 : 21,144.24 = 8,607.44 : x
  2. Step 2: Convert to fraction form
    15,321.28/21,144.24 = 8,607.44/x
  3. Step 3: Cross multiply
    15,321.28x = 21,144.24 × 8,607.44
  4. Step 4: Simplify right side
    15,321.28x = 181,997,777.15
  5. Step 5: Solve for x
    x = 181,997,777.15/15,321.28
  6. Step 6: Final answer
    x = 11,878.76

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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.