Home / 15,509.78-21,403.24-8,610.71

Finding the Fourth Proportional to 15,509.78, 21,403.24 and 8,610.71

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Solution

The fourth proportional to 15,509.78, 21,403.24 and 8,610.71 is: 11,882.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.78 : 21,403.24 = 8,610.71 : x
  2. Step 2: Convert to fraction form
    15,509.78/21,403.24 = 8,610.71/x
  3. Step 3: Cross multiply
    15,509.78x = 21,403.24 × 8,610.71
  4. Step 4: Simplify right side
    15,509.78x = 184,297,092.70
  5. Step 5: Solve for x
    x = 184,297,092.70/15,509.78
  6. Step 6: Final answer
    x = 11,882.64

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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.