Home / 13,165.20-19,747.80-12,171.60

Finding the Fourth Proportional to 13,165.20, 19,747.80 and 12,171.60

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Solution

The fourth proportional to 13,165.20, 19,747.80 and 12,171.60 is: 18,257.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,165.20 : 19,747.80 = 12,171.60 : x
  2. Step 2: Convert to fraction form
    13,165.20/19,747.80 = 12,171.60/x
  3. Step 3: Cross multiply
    13,165.20x = 19,747.80 × 12,171.60
  4. Step 4: Simplify right side
    13,165.20x = 240,362,322.48
  5. Step 5: Solve for x
    x = 240,362,322.48/13,165.20
  6. Step 6: Final answer
    x = 18,257.40

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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.