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Finding the Fourth Proportional to 18,690.47, 28,028.71 and 7,593.42

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Solution

The fourth proportional to 18,690.47, 28,028.71 and 7,593.42 is: 11,387.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.47 : 28,028.71 = 7,593.42 : x
  2. Step 2: Convert to fraction form
    18,690.47/28,028.71 = 7,593.42/x
  3. Step 3: Cross multiply
    18,690.47x = 28,028.71 × 7,593.42
  4. Step 4: Simplify right side
    18,690.47x = 212,833,626.94
  5. Step 5: Solve for x
    x = 212,833,626.94/18,690.47
  6. Step 6: Final answer
    x = 11,387.28

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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.