Home / 13,121.06-18,106.44-7,455.02

Finding the Fourth Proportional to 13,121.06, 18,106.44 and 7,455.02

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Solution

The fourth proportional to 13,121.06, 18,106.44 and 7,455.02 is: 10,287.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.06 : 18,106.44 = 7,455.02 : x
  2. Step 2: Convert to fraction form
    13,121.06/18,106.44 = 7,455.02/x
  3. Step 3: Cross multiply
    13,121.06x = 18,106.44 × 7,455.02
  4. Step 4: Simplify right side
    13,121.06x = 134,983,872.33
  5. Step 5: Solve for x
    x = 134,983,872.33/13,121.06
  6. Step 6: Final answer
    x = 10,287.57

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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.