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Finding the Fourth Proportional to 38,611.20, 57,916.80 and 18,892.80

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Solution

The fourth proportional to 38,611.20, 57,916.80 and 18,892.80 is: 28,339.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,611.20 : 57,916.80 = 18,892.80 : x
  2. Step 2: Convert to fraction form
    38,611.20/57,916.80 = 18,892.80/x
  3. Step 3: Cross multiply
    38,611.20x = 57,916.80 × 18,892.80
  4. Step 4: Simplify right side
    38,611.20x = 1,094,210,519.04
  5. Step 5: Solve for x
    x = 1,094,210,519.04/38,611.20
  6. Step 6: Final answer
    x = 28,339.20

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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.