Home / 15,521.32-21,418.78-8,447.74

Finding the Fourth Proportional to 15,521.32, 21,418.78 and 8,447.74

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Solution

The fourth proportional to 15,521.32, 21,418.78 and 8,447.74 is: 11,657.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.32 : 21,418.78 = 8,447.74 : x
  2. Step 2: Convert to fraction form
    15,521.32/21,418.78 = 8,447.74/x
  3. Step 3: Cross multiply
    15,521.32x = 21,418.78 × 8,447.74
  4. Step 4: Simplify right side
    15,521.32x = 180,940,284.56
  5. Step 5: Solve for x
    x = 180,940,284.56/15,521.32
  6. Step 6: Final answer
    x = 11,657.53

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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.