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Finding the Fourth Proportional to 18,240.50, 27,360.75 and 4,389.50

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Solution

The fourth proportional to 18,240.50, 27,360.75 and 4,389.50 is: 6,584.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,240.50 : 27,360.75 = 4,389.50 : x
  2. Step 2: Convert to fraction form
    18,240.50/27,360.75 = 4,389.50/x
  3. Step 3: Cross multiply
    18,240.50x = 27,360.75 × 4,389.50
  4. Step 4: Simplify right side
    18,240.50x = 120,100,012.13
  5. Step 5: Solve for x
    x = 120,100,012.13/18,240.50
  6. Step 6: Final answer
    x = 6,584.25

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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.