Home / 15,509.54-21,403.23-9,221.78

Finding the Fourth Proportional to 15,509.54, 21,403.23 and 9,221.78

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Solution

The fourth proportional to 15,509.54, 21,403.23 and 9,221.78 is: 12,726.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.54 : 21,403.23 = 9,221.78 : x
  2. Step 2: Convert to fraction form
    15,509.54/21,403.23 = 9,221.78/x
  3. Step 3: Cross multiply
    15,509.54x = 21,403.23 × 9,221.78
  4. Step 4: Simplify right side
    15,509.54x = 197,375,878.35
  5. Step 5: Solve for x
    x = 197,375,878.35/15,509.54
  6. Step 6: Final answer
    x = 12,726.09

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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.