Home / 20,219.83-30,438.92-18,185.39

Finding the Fourth Proportional to 20,219.83, 30,438.92 and 18,185.39

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Solution

The fourth proportional to 20,219.83, 30,438.92 and 18,185.39 is: 27,376.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.83 : 30,438.92 = 18,185.39 : x
  2. Step 2: Convert to fraction form
    20,219.83/30,438.92 = 18,185.39/x
  3. Step 3: Cross multiply
    20,219.83x = 30,438.92 × 18,185.39
  4. Step 4: Simplify right side
    20,219.83x = 553,543,810.01
  5. Step 5: Solve for x
    x = 553,543,810.01/20,219.83
  6. Step 6: Final answer
    x = 27,376.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.