Home / 15,660.78-21,611.72-8,587.25

Finding the Fourth Proportional to 15,660.78, 21,611.72 and 8,587.25

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Solution

The fourth proportional to 15,660.78, 21,611.72 and 8,587.25 is: 11,850.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.78 : 21,611.72 = 8,587.25 : x
  2. Step 2: Convert to fraction form
    15,660.78/21,611.72 = 8,587.25/x
  3. Step 3: Cross multiply
    15,660.78x = 21,611.72 × 8,587.25
  4. Step 4: Simplify right side
    15,660.78x = 185,585,318.07
  5. Step 5: Solve for x
    x = 185,585,318.07/15,660.78
  6. Step 6: Final answer
    x = 11,850.32

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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.