Home / 13,145.28-18,150.57-8,675.40

Finding the Fourth Proportional to 13,145.28, 18,150.57 and 8,675.40

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Solution

The fourth proportional to 13,145.28, 18,150.57 and 8,675.40 is: 11,978.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.28 : 18,150.57 = 8,675.40 : x
  2. Step 2: Convert to fraction form
    13,145.28/18,150.57 = 8,675.40/x
  3. Step 3: Cross multiply
    13,145.28x = 18,150.57 × 8,675.40
  4. Step 4: Simplify right side
    13,145.28x = 157,463,454.98
  5. Step 5: Solve for x
    x = 157,463,454.98/13,145.28
  6. Step 6: Final answer
    x = 11,978.71

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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.