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Finding the Fourth Proportional to 18,503.20, 27,730.16 and 6,805.60

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Solution

The fourth proportional to 18,503.20, 27,730.16 and 6,805.60 is: 10,199.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,503.20 : 27,730.16 = 6,805.60 : x
  2. Step 2: Convert to fraction form
    18,503.20/27,730.16 = 6,805.60/x
  3. Step 3: Cross multiply
    18,503.20x = 27,730.16 × 6,805.60
  4. Step 4: Simplify right side
    18,503.20x = 188,720,376.90
  5. Step 5: Solve for x
    x = 188,720,376.90/18,503.20
  6. Step 6: Final answer
    x = 10,199.34

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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.