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Finding the Fourth Proportional to 15,455.40, 23,183.10 and 7,679.40

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Solution

The fourth proportional to 15,455.40, 23,183.10 and 7,679.40 is: 11,519.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.40 : 23,183.10 = 7,679.40 : x
  2. Step 2: Convert to fraction form
    15,455.40/23,183.10 = 7,679.40/x
  3. Step 3: Cross multiply
    15,455.40x = 23,183.10 × 7,679.40
  4. Step 4: Simplify right side
    15,455.40x = 178,032,298.14
  5. Step 5: Solve for x
    x = 178,032,298.14/15,455.40
  6. Step 6: Final answer
    x = 11,519.10

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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.