Home / 9,991.42-13,785.40-5,742.26

Finding the Fourth Proportional to 9,991.42, 13,785.40 and 5,742.26

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Solution

The fourth proportional to 9,991.42, 13,785.40 and 5,742.26 is: 7,922.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.42 : 13,785.40 = 5,742.26 : x
  2. Step 2: Convert to fraction form
    9,991.42/13,785.40 = 5,742.26/x
  3. Step 3: Cross multiply
    9,991.42x = 13,785.40 × 5,742.26
  4. Step 4: Simplify right side
    9,991.42x = 79,159,351.00
  5. Step 5: Solve for x
    x = 79,159,351.00/9,991.42
  6. Step 6: Final answer
    x = 7,922.73

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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.