Home / 12,984.60-17,920.40-8,512.12

Finding the Fourth Proportional to 12,984.60, 17,920.40 and 8,512.12

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Solution

The fourth proportional to 12,984.60, 17,920.40 and 8,512.12 is: 11,747.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,984.60 : 17,920.40 = 8,512.12 : x
  2. Step 2: Convert to fraction form
    12,984.60/17,920.40 = 8,512.12/x
  3. Step 3: Cross multiply
    12,984.60x = 17,920.40 × 8,512.12
  4. Step 4: Simplify right side
    12,984.60x = 152,540,595.25
  5. Step 5: Solve for x
    x = 152,540,595.25/12,984.60
  6. Step 6: Final answer
    x = 11,747.81

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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.