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Finding the Fourth Proportional to 15,056, 20,777.28 and 9,168

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Solution

The fourth proportional to 15,056, 20,777.28 and 9,168 is: 12,651.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,056 : 20,777.28 = 9,168 : x
  2. Step 2: Convert to fraction form
    15,056/20,777.28 = 9,168/x
  3. Step 3: Cross multiply
    15,056x = 20,777.28 × 9,168
  4. Step 4: Simplify right side
    15,056x = 190,486,103.04
  5. Step 5: Solve for x
    x = 190,486,103.04/15,056
  6. Step 6: Final answer
    x = 12,651.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.