Home / 12,179.60-16,812.60-7,989.20

Finding the Fourth Proportional to 12,179.60, 16,812.60 and 7,989.20

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Solution

The fourth proportional to 12,179.60, 16,812.60 and 7,989.20 is: 11,028.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,179.60 : 16,812.60 = 7,989.20 : x
  2. Step 2: Convert to fraction form
    12,179.60/16,812.60 = 7,989.20/x
  3. Step 3: Cross multiply
    12,179.60x = 16,812.60 × 7,989.20
  4. Step 4: Simplify right side
    12,179.60x = 134,319,223.92
  5. Step 5: Solve for x
    x = 134,319,223.92/12,179.60
  6. Step 6: Final answer
    x = 11,028.21

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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.