Home / 12,145.45-16,760.38-6,840.15

Finding the Fourth Proportional to 12,145.45, 16,760.38 and 6,840.15

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Solution

The fourth proportional to 12,145.45, 16,760.38 and 6,840.15 is: 9,439.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.45 : 16,760.38 = 6,840.15 : x
  2. Step 2: Convert to fraction form
    12,145.45/16,760.38 = 6,840.15/x
  3. Step 3: Cross multiply
    12,145.45x = 16,760.38 × 6,840.15
  4. Step 4: Simplify right side
    12,145.45x = 114,643,513.26
  5. Step 5: Solve for x
    x = 114,643,513.26/12,145.45
  6. Step 6: Final answer
    x = 9,439.21

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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.