Home / 12,383.60-18,575.40-8,155.40

Finding the Fourth Proportional to 12,383.60, 18,575.40 and 8,155.40

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Solution

The fourth proportional to 12,383.60, 18,575.40 and 8,155.40 is: 12,233.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,383.60 : 18,575.40 = 8,155.40 : x
  2. Step 2: Convert to fraction form
    12,383.60/18,575.40 = 8,155.40/x
  3. Step 3: Cross multiply
    12,383.60x = 18,575.40 × 8,155.40
  4. Step 4: Simplify right side
    12,383.60x = 151,489,817.16
  5. Step 5: Solve for x
    x = 151,489,817.16/12,383.60
  6. Step 6: Final answer
    x = 12,233.10

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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.