Home / 13,120.12-18,110.82-9,611.20

Finding the Fourth Proportional to 13,120.12, 18,110.82 and 9,611.20

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Solution

The fourth proportional to 13,120.12, 18,110.82 and 9,611.20 is: 13,267.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.12 : 18,110.82 = 9,611.20 : x
  2. Step 2: Convert to fraction form
    13,120.12/18,110.82 = 9,611.20/x
  3. Step 3: Cross multiply
    13,120.12x = 18,110.82 × 9,611.20
  4. Step 4: Simplify right side
    13,120.12x = 174,066,713.18
  5. Step 5: Solve for x
    x = 174,066,713.18/13,120.12
  6. Step 6: Final answer
    x = 13,267.16

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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.