Home / 13,131.13-18,120.65-7,162.84

Finding the Fourth Proportional to 13,131.13, 18,120.65 and 7,162.84

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Solution

The fourth proportional to 13,131.13, 18,120.65 and 7,162.84 is: 9,884.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.13 : 18,120.65 = 7,162.84 : x
  2. Step 2: Convert to fraction form
    13,131.13/18,120.65 = 7,162.84/x
  3. Step 3: Cross multiply
    13,131.13x = 18,120.65 × 7,162.84
  4. Step 4: Simplify right side
    13,131.13x = 129,795,280.83
  5. Step 5: Solve for x
    x = 129,795,280.83/13,131.13
  6. Step 6: Final answer
    x = 9,884.55

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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.