Home / 9,991.60-13,786.87-5,742.81

Finding the Fourth Proportional to 9,991.60, 13,786.87 and 5,742.81

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Solution

The fourth proportional to 9,991.60, 13,786.87 and 5,742.81 is: 7,924.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.60 : 13,786.87 = 5,742.81 : x
  2. Step 2: Convert to fraction form
    9,991.60/13,786.87 = 5,742.81/x
  3. Step 3: Cross multiply
    9,991.60x = 13,786.87 × 5,742.81
  4. Step 4: Simplify right side
    9,991.60x = 79,175,374.90
  5. Step 5: Solve for x
    x = 79,175,374.90/9,991.60
  6. Step 6: Final answer
    x = 7,924.19

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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.