Home / 13,131.32-18,120.81-7,466.68

Finding the Fourth Proportional to 13,131.32, 18,120.81 and 7,466.68

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Solution

The fourth proportional to 13,131.32, 18,120.81 and 7,466.68 is: 10,303.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.32 : 18,120.81 = 7,466.68 : x
  2. Step 2: Convert to fraction form
    13,131.32/18,120.81 = 7,466.68/x
  3. Step 3: Cross multiply
    13,131.32x = 18,120.81 × 7,466.68
  4. Step 4: Simplify right side
    13,131.32x = 135,302,277.26
  5. Step 5: Solve for x
    x = 135,302,277.26/13,131.32
  6. Step 6: Final answer
    x = 10,303.79

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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.