Home / 12,116.80-18,164.40-7,181.20

Finding the Fourth Proportional to 12,116.80, 18,164.40 and 7,181.20

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Solution

The fourth proportional to 12,116.80, 18,164.40 and 7,181.20 is: 10,765.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,116.80 : 18,164.40 = 7,181.20 : x
  2. Step 2: Convert to fraction form
    12,116.80/18,164.40 = 7,181.20/x
  3. Step 3: Cross multiply
    12,116.80x = 18,164.40 × 7,181.20
  4. Step 4: Simplify right side
    12,116.80x = 130,442,189.28
  5. Step 5: Solve for x
    x = 130,442,189.28/12,116.80
  6. Step 6: Final answer
    x = 10,765.40

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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.