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Finding the Fourth Proportional to 18,393.40, 27,581.92 and 5,242.80

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Solution

The fourth proportional to 18,393.40, 27,581.92 and 5,242.80 is: 7,861.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,393.40 : 27,581.92 = 5,242.80 : x
  2. Step 2: Convert to fraction form
    18,393.40/27,581.92 = 5,242.80/x
  3. Step 3: Cross multiply
    18,393.40x = 27,581.92 × 5,242.80
  4. Step 4: Simplify right side
    18,393.40x = 144,606,490.18
  5. Step 5: Solve for x
    x = 144,606,490.18/18,393.40
  6. Step 6: Final answer
    x = 7,861.87

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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.