Home / 21,166.32-29,200.11-13,611.24

Finding the Fourth Proportional to 21,166.32, 29,200.11 and 13,611.24

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Solution

The fourth proportional to 21,166.32, 29,200.11 and 13,611.24 is: 18,777.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.32 : 29,200.11 = 13,611.24 : x
  2. Step 2: Convert to fraction form
    21,166.32/29,200.11 = 13,611.24/x
  3. Step 3: Cross multiply
    21,166.32x = 29,200.11 × 13,611.24
  4. Step 4: Simplify right side
    21,166.32x = 397,449,705.24
  5. Step 5: Solve for x
    x = 397,449,705.24/21,166.32
  6. Step 6: Final answer
    x = 18,777.46

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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.