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Finding the Fourth Proportional to 12,560.55, 18,844.78 and 7,883.81

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Solution

The fourth proportional to 12,560.55, 18,844.78 and 7,883.81 is: 11,828.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,560.55 : 18,844.78 = 7,883.81 : x
  2. Step 2: Convert to fraction form
    12,560.55/18,844.78 = 7,883.81/x
  3. Step 3: Cross multiply
    12,560.55x = 18,844.78 × 7,883.81
  4. Step 4: Simplify right side
    12,560.55x = 148,568,665.01
  5. Step 5: Solve for x
    x = 148,568,665.01/12,560.55
  6. Step 6: Final answer
    x = 11,828.20

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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.