Home / 12,383.60-18,575.40-7,134.80

Finding the Fourth Proportional to 12,383.60, 18,575.40 and 7,134.80

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Solution

The fourth proportional to 12,383.60, 18,575.40 and 7,134.80 is: 10,702.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,383.60 : 18,575.40 = 7,134.80 : x
  2. Step 2: Convert to fraction form
    12,383.60/18,575.40 = 7,134.80/x
  3. Step 3: Cross multiply
    12,383.60x = 18,575.40 × 7,134.80
  4. Step 4: Simplify right side
    12,383.60x = 132,531,763.92
  5. Step 5: Solve for x
    x = 132,531,763.92/12,383.60
  6. Step 6: Final answer
    x = 10,702.20

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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.