Home / 12,180.91-16,812.44-7,145.34

Finding the Fourth Proportional to 12,180.91, 16,812.44 and 7,145.34

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Solution

The fourth proportional to 12,180.91, 16,812.44 and 7,145.34 is: 9,862.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.91 : 16,812.44 = 7,145.34 : x
  2. Step 2: Convert to fraction form
    12,180.91/16,812.44 = 7,145.34/x
  3. Step 3: Cross multiply
    12,180.91x = 16,812.44 × 7,145.34
  4. Step 4: Simplify right side
    12,180.91x = 120,130,659.92
  5. Step 5: Solve for x
    x = 120,130,659.92/12,180.91
  6. Step 6: Final answer
    x = 9,862.21

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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.