Home / 20,611.56-28,435.88-13,449.90

Finding the Fourth Proportional to 20,611.56, 28,435.88 and 13,449.90

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Solution

The fourth proportional to 20,611.56, 28,435.88 and 13,449.90 is: 18,555.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.56 : 28,435.88 = 13,449.90 : x
  2. Step 2: Convert to fraction form
    20,611.56/28,435.88 = 13,449.90/x
  3. Step 3: Cross multiply
    20,611.56x = 28,435.88 × 13,449.90
  4. Step 4: Simplify right side
    20,611.56x = 382,459,742.41
  5. Step 5: Solve for x
    x = 382,459,742.41/20,611.56
  6. Step 6: Final answer
    x = 18,555.59

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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.