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Finding the Fourth Proportional to 18,031.75, 27,047.63 and 5,719.75

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Solution

The fourth proportional to 18,031.75, 27,047.63 and 5,719.75 is: 8,579.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,031.75 : 27,047.63 = 5,719.75 : x
  2. Step 2: Convert to fraction form
    18,031.75/27,047.63 = 5,719.75/x
  3. Step 3: Cross multiply
    18,031.75x = 27,047.63 × 5,719.75
  4. Step 4: Simplify right side
    18,031.75x = 154,705,681.69
  5. Step 5: Solve for x
    x = 154,705,681.69/18,031.75
  6. Step 6: Final answer
    x = 8,579.63

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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.