Home / 15,508.83-21,404.23-15,086.64

Finding the Fourth Proportional to 15,508.83, 21,404.23 and 15,086.64

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Solution

The fourth proportional to 15,508.83, 21,404.23 and 15,086.64 is: 20,821.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.83 : 21,404.23 = 15,086.64 : x
  2. Step 2: Convert to fraction form
    15,508.83/21,404.23 = 15,086.64/x
  3. Step 3: Cross multiply
    15,508.83x = 21,404.23 × 15,086.64
  4. Step 4: Simplify right side
    15,508.83x = 322,917,912.49
  5. Step 5: Solve for x
    x = 322,917,912.49/15,508.83
  6. Step 6: Final answer
    x = 20,821.55

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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.