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Finding the Fourth Proportional to 18,614.55, 27,921.76 and 7,521.10

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Solution

The fourth proportional to 18,614.55, 27,921.76 and 7,521.10 is: 11,281.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,614.55 : 27,921.76 = 7,521.10 : x
  2. Step 2: Convert to fraction form
    18,614.55/27,921.76 = 7,521.10/x
  3. Step 3: Cross multiply
    18,614.55x = 27,921.76 × 7,521.10
  4. Step 4: Simplify right side
    18,614.55x = 210,002,412.57
  5. Step 5: Solve for x
    x = 210,002,412.57/18,614.55
  6. Step 6: Final answer
    x = 11,281.63

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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.