Home / 12,078.75-16,684.20-9,280.55

Finding the Fourth Proportional to 12,078.75, 16,684.20 and 9,280.55

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Solution

The fourth proportional to 12,078.75, 16,684.20 and 9,280.55 is: 12,819.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.75 : 16,684.20 = 9,280.55 : x
  2. Step 2: Convert to fraction form
    12,078.75/16,684.20 = 9,280.55/x
  3. Step 3: Cross multiply
    12,078.75x = 16,684.20 × 9,280.55
  4. Step 4: Simplify right side
    12,078.75x = 154,838,573.20
  5. Step 5: Solve for x
    x = 154,838,573.20/12,078.75
  6. Step 6: Final answer
    x = 12,819.09

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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.