Home / 13,145.64-18,142.57-7,481.77

Finding the Fourth Proportional to 13,145.64, 18,142.57 and 7,481.77

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Solution

The fourth proportional to 13,145.64, 18,142.57 and 7,481.77 is: 10,325.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.64 : 18,142.57 = 7,481.77 : x
  2. Step 2: Convert to fraction form
    13,145.64/18,142.57 = 7,481.77/x
  3. Step 3: Cross multiply
    13,145.64x = 18,142.57 × 7,481.77
  4. Step 4: Simplify right side
    13,145.64x = 135,738,463.94
  5. Step 5: Solve for x
    x = 135,738,463.94/13,145.64
  6. Step 6: Final answer
    x = 10,325.74

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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.