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Finding the Fourth Proportional to 18,405.66, 27,608.94 and 6,718.89

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Solution

The fourth proportional to 18,405.66, 27,608.94 and 6,718.89 is: 10,078.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.66 : 27,608.94 = 6,718.89 : x
  2. Step 2: Convert to fraction form
    18,405.66/27,608.94 = 6,718.89/x
  3. Step 3: Cross multiply
    18,405.66x = 27,608.94 × 6,718.89
  4. Step 4: Simplify right side
    18,405.66x = 185,501,430.88
  5. Step 5: Solve for x
    x = 185,501,430.88/18,405.66
  6. Step 6: Final answer
    x = 10,078.50

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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.