Home / 19,785.10-27,321.94-12,723.78

Finding the Fourth Proportional to 19,785.10, 27,321.94 and 12,723.78

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Solution

The fourth proportional to 19,785.10, 27,321.94 and 12,723.78 is: 17,570.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,785.10 : 27,321.94 = 12,723.78 : x
  2. Step 2: Convert to fraction form
    19,785.10/27,321.94 = 12,723.78/x
  3. Step 3: Cross multiply
    19,785.10x = 27,321.94 × 12,723.78
  4. Step 4: Simplify right side
    19,785.10x = 347,638,353.73
  5. Step 5: Solve for x
    x = 347,638,353.73/19,785.10
  6. Step 6: Final answer
    x = 17,570.72

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1.5x scale

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.