Home / 12,120.54-18,180.59-3,114.55

Finding the Fourth Proportional to 12,120.54, 18,180.59 and 3,114.55

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Solution

The fourth proportional to 12,120.54, 18,180.59 and 3,114.55 is: 4,671.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.54 : 18,180.59 = 3,114.55 : x
  2. Step 2: Convert to fraction form
    12,120.54/18,180.59 = 3,114.55/x
  3. Step 3: Cross multiply
    12,120.54x = 18,180.59 × 3,114.55
  4. Step 4: Simplify right side
    12,120.54x = 56,624,363.74
  5. Step 5: Solve for x
    x = 56,624,363.74/12,120.54
  6. Step 6: Final answer
    x = 4,671.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.