Home / 15,611.78-21,518.97-12,202.85

Finding the Fourth Proportional to 15,611.78, 21,518.97 and 12,202.85

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Solution

The fourth proportional to 15,611.78, 21,518.97 and 12,202.85 is: 16,820.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.78 : 21,518.97 = 12,202.85 : x
  2. Step 2: Convert to fraction form
    15,611.78/21,518.97 = 12,202.85/x
  3. Step 3: Cross multiply
    15,611.78x = 21,518.97 × 12,202.85
  4. Step 4: Simplify right side
    15,611.78x = 262,592,763.06
  5. Step 5: Solve for x
    x = 262,592,763.06/15,611.78
  6. Step 6: Final answer
    x = 16,820.17

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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.