Home / 8,181.60-12,272.40-6,885.60

Finding the Fourth Proportional to 8,181.60, 12,272.40 and 6,885.60

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Solution

The fourth proportional to 8,181.60, 12,272.40 and 6,885.60 is: 10,328.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,181.60 : 12,272.40 = 6,885.60 : x
  2. Step 2: Convert to fraction form
    8,181.60/12,272.40 = 6,885.60/x
  3. Step 3: Cross multiply
    8,181.60x = 12,272.40 × 6,885.60
  4. Step 4: Simplify right side
    8,181.60x = 84,502,837.44
  5. Step 5: Solve for x
    x = 84,502,837.44/8,181.60
  6. Step 6: Final answer
    x = 10,328.40

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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.