Home / 12,155.30-18,231.60-9,960.20

Finding the Fourth Proportional to 12,155.30, 18,231.60 and 9,960.20

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Solution

The fourth proportional to 12,155.30, 18,231.60 and 9,960.20 is: 14,939.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.30 : 18,231.60 = 9,960.20 : x
  2. Step 2: Convert to fraction form
    12,155.30/18,231.60 = 9,960.20/x
  3. Step 3: Cross multiply
    12,155.30x = 18,231.60 × 9,960.20
  4. Step 4: Simplify right side
    12,155.30x = 181,590,382.32
  5. Step 5: Solve for x
    x = 181,590,382.32/12,155.30
  6. Step 6: Final answer
    x = 14,939.19

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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.