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Finding the Fourth Proportional to 18,728.60, 28,093.98 and 7,041.92

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Solution

The fourth proportional to 18,728.60, 28,093.98 and 7,041.92 is: 10,563.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.60 : 28,093.98 = 7,041.92 : x
  2. Step 2: Convert to fraction form
    18,728.60/28,093.98 = 7,041.92/x
  3. Step 3: Cross multiply
    18,728.60x = 28,093.98 × 7,041.92
  4. Step 4: Simplify right side
    18,728.60x = 197,835,583.80
  5. Step 5: Solve for x
    x = 197,835,583.80/18,728.60
  6. Step 6: Final answer
    x = 10,563.29

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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.