Home / 15,611.82-21,544.32-8,538.90

Finding the Fourth Proportional to 15,611.82, 21,544.32 and 8,538.90

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Solution

The fourth proportional to 15,611.82, 21,544.32 and 8,538.90 is: 11,783.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.82 : 21,544.32 = 8,538.90 : x
  2. Step 2: Convert to fraction form
    15,611.82/21,544.32 = 8,538.90/x
  3. Step 3: Cross multiply
    15,611.82x = 21,544.32 × 8,538.90
  4. Step 4: Simplify right side
    15,611.82x = 183,964,794.05
  5. Step 5: Solve for x
    x = 183,964,794.05/15,611.82
  6. Step 6: Final answer
    x = 11,783.69

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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.