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Finding the Fourth Proportional to 18,555.75, 27,763.88 and 13,019.90

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Solution

The fourth proportional to 18,555.75, 27,763.88 and 13,019.90 is: 19,480.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.75 : 27,763.88 = 13,019.90 : x
  2. Step 2: Convert to fraction form
    18,555.75/27,763.88 = 13,019.90/x
  3. Step 3: Cross multiply
    18,555.75x = 27,763.88 × 13,019.90
  4. Step 4: Simplify right side
    18,555.75x = 361,482,737.29
  5. Step 5: Solve for x
    x = 361,482,737.29/18,555.75
  6. Step 6: Final answer
    x = 19,480.90

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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.