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Finding the Fourth Proportional to 18,655.80, 27,988.81 and 5,508.16

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Solution

The fourth proportional to 18,655.80, 27,988.81 and 5,508.16 is: 8,263.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.80 : 27,988.81 = 5,508.16 : x
  2. Step 2: Convert to fraction form
    18,655.80/27,988.81 = 5,508.16/x
  3. Step 3: Cross multiply
    18,655.80x = 27,988.81 × 5,508.16
  4. Step 4: Simplify right side
    18,655.80x = 154,166,843.69
  5. Step 5: Solve for x
    x = 154,166,843.69/18,655.80
  6. Step 6: Final answer
    x = 8,263.75

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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.