Home / 13,608.24-20,412.36-8,990.16

Finding the Fourth Proportional to 13,608.24, 20,412.36 and 8,990.16

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Solution

The fourth proportional to 13,608.24, 20,412.36 and 8,990.16 is: 13,485.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.24 : 20,412.36 = 8,990.16 : x
  2. Step 2: Convert to fraction form
    13,608.24/20,412.36 = 8,990.16/x
  3. Step 3: Cross multiply
    13,608.24x = 20,412.36 × 8,990.16
  4. Step 4: Simplify right side
    13,608.24x = 183,510,382.38
  5. Step 5: Solve for x
    x = 183,510,382.38/13,608.24
  6. Step 6: Final answer
    x = 13,485.24

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Similar ratio
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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.