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Finding the Fourth Proportional to 18,675.10, 27,988.42 and 7,568.80

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Solution

The fourth proportional to 18,675.10, 27,988.42 and 7,568.80 is: 11,343.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,675.10 : 27,988.42 = 7,568.80 : x
  2. Step 2: Convert to fraction form
    18,675.10/27,988.42 = 7,568.80/x
  3. Step 3: Cross multiply
    18,675.10x = 27,988.42 × 7,568.80
  4. Step 4: Simplify right side
    18,675.10x = 211,838,753.30
  5. Step 5: Solve for x
    x = 211,838,753.30/18,675.10
  6. Step 6: Final answer
    x = 11,343.38

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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.