Home / 13,181.76-18,187.20-7,874.64

Finding the Fourth Proportional to 13,181.76, 18,187.20 and 7,874.64

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Solution

The fourth proportional to 13,181.76, 18,187.20 and 7,874.64 is: 10,864.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.76 : 18,187.20 = 7,874.64 : x
  2. Step 2: Convert to fraction form
    13,181.76/18,187.20 = 7,874.64/x
  3. Step 3: Cross multiply
    13,181.76x = 18,187.20 × 7,874.64
  4. Step 4: Simplify right side
    13,181.76x = 143,217,652.61
  5. Step 5: Solve for x
    x = 143,217,652.61/13,181.76
  6. Step 6: Final answer
    x = 10,864.84

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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.