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Finding the Fourth Proportional to 18,608.80, 27,915.78 and 5,459.32

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Solution

The fourth proportional to 18,608.80, 27,915.78 and 5,459.32 is: 8,189.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.80 : 27,915.78 = 5,459.32 : x
  2. Step 2: Convert to fraction form
    18,608.80/27,915.78 = 5,459.32/x
  3. Step 3: Cross multiply
    18,608.80x = 27,915.78 × 5,459.32
  4. Step 4: Simplify right side
    18,608.80x = 152,401,176.07
  5. Step 5: Solve for x
    x = 152,401,176.07/18,608.80
  6. Step 6: Final answer
    x = 8,189.74

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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.