Home / 13,131.81-18,121.26-7,466.40

Finding the Fourth Proportional to 13,131.81, 18,121.26 and 7,466.40

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Solution

The fourth proportional to 13,131.81, 18,121.26 and 7,466.40 is: 10,303.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.81 : 18,121.26 = 7,466.40 : x
  2. Step 2: Convert to fraction form
    13,131.81/18,121.26 = 7,466.40/x
  3. Step 3: Cross multiply
    13,131.81x = 18,121.26 × 7,466.40
  4. Step 4: Simplify right side
    13,131.81x = 135,300,575.66
  5. Step 5: Solve for x
    x = 135,300,575.66/13,131.81
  6. Step 6: Final answer
    x = 10,303.27

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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.