Home / 13,137.06-18,129.08-7,168.71

Finding the Fourth Proportional to 13,137.06, 18,129.08 and 7,168.71

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Solution

The fourth proportional to 13,137.06, 18,129.08 and 7,168.71 is: 9,892.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.06 : 18,129.08 = 7,168.71 : x
  2. Step 2: Convert to fraction form
    13,137.06/18,129.08 = 7,168.71/x
  3. Step 3: Cross multiply
    13,137.06x = 18,129.08 × 7,168.71
  4. Step 4: Simplify right side
    13,137.06x = 129,962,117.09
  5. Step 5: Solve for x
    x = 129,962,117.09/13,137.06
  6. Step 6: Final answer
    x = 9,892.79

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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.