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Finding the Fourth Proportional to 18,320.45, 27,484.38 and 7,790.45

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Solution

The fourth proportional to 18,320.45, 27,484.38 and 7,790.45 is: 11,687.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,320.45 : 27,484.38 = 7,790.45 : x
  2. Step 2: Convert to fraction form
    18,320.45/27,484.38 = 7,790.45/x
  3. Step 3: Cross multiply
    18,320.45x = 27,484.38 × 7,790.45
  4. Step 4: Simplify right side
    18,320.45x = 214,115,550.75
  5. Step 5: Solve for x
    x = 214,115,550.75/18,320.45
  6. Step 6: Final answer
    x = 11,687.25

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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.