Home / 20,611.56-28,439.16-13,909.62

Finding the Fourth Proportional to 20,611.56, 28,439.16 and 13,909.62

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Solution

The fourth proportional to 20,611.56, 28,439.16 and 13,909.62 is: 19,192.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.56 : 28,439.16 = 13,909.62 : x
  2. Step 2: Convert to fraction form
    20,611.56/28,439.16 = 13,909.62/x
  3. Step 3: Cross multiply
    20,611.56x = 28,439.16 × 13,909.62
  4. Step 4: Simplify right side
    20,611.56x = 395,577,908.72
  5. Step 5: Solve for x
    x = 395,577,908.72/20,611.56
  6. Step 6: Final answer
    x = 19,192.04

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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.