Home / 15,660.66-21,611.70-8,587.20

Finding the Fourth Proportional to 15,660.66, 21,611.70 and 8,587.20

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Solution

The fourth proportional to 15,660.66, 21,611.70 and 8,587.20 is: 11,850.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.66 : 21,611.70 = 8,587.20 : x
  2. Step 2: Convert to fraction form
    15,660.66/21,611.70 = 8,587.20/x
  3. Step 3: Cross multiply
    15,660.66x = 21,611.70 × 8,587.20
  4. Step 4: Simplify right side
    15,660.66x = 185,583,990.24
  5. Step 5: Solve for x
    x = 185,583,990.24/15,660.66
  6. Step 6: Final answer
    x = 11,850.33

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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.