Home / 20,579.40-30,869.10-18,611.10

Finding the Fourth Proportional to 20,579.40, 30,869.10 and 18,611.10

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Solution

The fourth proportional to 20,579.40, 30,869.10 and 18,611.10 is: 27,916.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.40 : 30,869.10 = 18,611.10 : x
  2. Step 2: Convert to fraction form
    20,579.40/30,869.10 = 18,611.10/x
  3. Step 3: Cross multiply
    20,579.40x = 30,869.10 × 18,611.10
  4. Step 4: Simplify right side
    20,579.40x = 574,507,907.01
  5. Step 5: Solve for x
    x = 574,507,907.01/20,579.40
  6. Step 6: Final answer
    x = 27,916.65

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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.