Home / 13,147.66-18,150.15-8,439.94

Finding the Fourth Proportional to 13,147.66, 18,150.15 and 8,439.94

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Solution

The fourth proportional to 13,147.66, 18,150.15 and 8,439.94 is: 11,651.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.66 : 18,150.15 = 8,439.94 : x
  2. Step 2: Convert to fraction form
    13,147.66/18,150.15 = 8,439.94/x
  3. Step 3: Cross multiply
    13,147.66x = 18,150.15 × 8,439.94
  4. Step 4: Simplify right side
    13,147.66x = 153,186,176.99
  5. Step 5: Solve for x
    x = 153,186,176.99/13,147.66
  6. Step 6: Final answer
    x = 11,651.21

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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.