Home / 12,181.16-16,812.79-7,145.60

Finding the Fourth Proportional to 12,181.16, 16,812.79 and 7,145.60

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Solution

The fourth proportional to 12,181.16, 16,812.79 and 7,145.60 is: 9,862.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,181.16 : 16,812.79 = 7,145.60 : x
  2. Step 2: Convert to fraction form
    12,181.16/16,812.79 = 7,145.60/x
  3. Step 3: Cross multiply
    12,181.16x = 16,812.79 × 7,145.60
  4. Step 4: Simplify right side
    12,181.16x = 120,137,370.30
  5. Step 5: Solve for x
    x = 120,137,370.30/12,181.16
  6. Step 6: Final answer
    x = 9,862.55

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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.