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Finding the Fourth Proportional to 19,074.40, 28,611.60 and 18,005.20

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Solution

The fourth proportional to 19,074.40, 28,611.60 and 18,005.20 is: 27,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,074.40 : 28,611.60 = 18,005.20 : x
  2. Step 2: Convert to fraction form
    19,074.40/28,611.60 = 18,005.20/x
  3. Step 3: Cross multiply
    19,074.40x = 28,611.60 × 18,005.20
  4. Step 4: Simplify right side
    19,074.40x = 515,157,580.32
  5. Step 5: Solve for x
    x = 515,157,580.32/19,074.40
  6. Step 6: Final answer
    x = 27,007.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.