Home / 9,990.06-13,786.10-5,513.55

Finding the Fourth Proportional to 9,990.06, 13,786.10 and 5,513.55

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Solution

The fourth proportional to 9,990.06, 13,786.10 and 5,513.55 is: 7,608.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.06 : 13,786.10 = 5,513.55 : x
  2. Step 2: Convert to fraction form
    9,990.06/13,786.10 = 5,513.55/x
  3. Step 3: Cross multiply
    9,990.06x = 13,786.10 × 5,513.55
  4. Step 4: Simplify right side
    9,990.06x = 76,010,324.09
  5. Step 5: Solve for x
    x = 76,010,324.09/9,990.06
  6. Step 6: Final answer
    x = 7,608.60

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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.