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Finding the Fourth Proportional to 18,723.77, 28,077.85 and 7,622.92

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Solution

The fourth proportional to 18,723.77, 28,077.85 and 7,622.92 is: 11,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.77 : 28,077.85 = 7,622.92 : x
  2. Step 2: Convert to fraction form
    18,723.77/28,077.85 = 7,622.92/x
  3. Step 3: Cross multiply
    18,723.77x = 28,077.85 × 7,622.92
  4. Step 4: Simplify right side
    18,723.77x = 214,035,115.07
  5. Step 5: Solve for x
    x = 214,035,115.07/18,723.77
  6. Step 6: Final answer
    x = 11,431.20

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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.