Home / 13,129.66-18,115.68-7,752.22

Finding the Fourth Proportional to 13,129.66, 18,115.68 and 7,752.22

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Solution

The fourth proportional to 13,129.66, 18,115.68 and 7,752.22 is: 10,696.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.66 : 18,115.68 = 7,752.22 : x
  2. Step 2: Convert to fraction form
    13,129.66/18,115.68 = 7,752.22/x
  3. Step 3: Cross multiply
    13,129.66x = 18,115.68 × 7,752.22
  4. Step 4: Simplify right side
    13,129.66x = 140,436,720.59
  5. Step 5: Solve for x
    x = 140,436,720.59/13,129.66
  6. Step 6: Final answer
    x = 10,696.14

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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.