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Finding the Fourth Proportional to 18,614.47, 27,921.65 and 7,521.03

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Solution

The fourth proportional to 18,614.47, 27,921.65 and 7,521.03 is: 11,281.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,614.47 : 27,921.65 = 7,521.03 : x
  2. Step 2: Convert to fraction form
    18,614.47/27,921.65 = 7,521.03/x
  3. Step 3: Cross multiply
    18,614.47x = 27,921.65 × 7,521.03
  4. Step 4: Simplify right side
    18,614.47x = 209,999,390.09
  5. Step 5: Solve for x
    x = 209,999,390.09/18,614.47
  6. Step 6: Final answer
    x = 11,281.51

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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.