Home / 9,990.12-13,786.34-5,513.88

Finding the Fourth Proportional to 9,990.12, 13,786.34 and 5,513.88

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Solution

The fourth proportional to 9,990.12, 13,786.34 and 5,513.88 is: 7,609.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.12 : 13,786.34 = 5,513.88 : x
  2. Step 2: Convert to fraction form
    9,990.12/13,786.34 = 5,513.88/x
  3. Step 3: Cross multiply
    9,990.12x = 13,786.34 × 5,513.88
  4. Step 4: Simplify right side
    9,990.12x = 76,016,224.40
  5. Step 5: Solve for x
    x = 76,016,224.40/9,990.12
  6. Step 6: Final answer
    x = 7,609.14

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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.