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Finding the Fourth Proportional to 18,606.90, 27,911.19 and 5,280.84

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Solution

The fourth proportional to 18,606.90, 27,911.19 and 5,280.84 is: 7,921.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,606.90 : 27,911.19 = 5,280.84 : x
  2. Step 2: Convert to fraction form
    18,606.90/27,911.19 = 5,280.84/x
  3. Step 3: Cross multiply
    18,606.90x = 27,911.19 × 5,280.84
  4. Step 4: Simplify right side
    18,606.90x = 147,394,528.60
  5. Step 5: Solve for x
    x = 147,394,528.60/18,606.90
  6. Step 6: Final answer
    x = 7,921.50

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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.