Home / 12,071.38-18,114.36-7,690.36

Finding the Fourth Proportional to 12,071.38, 18,114.36 and 7,690.36

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Solution

The fourth proportional to 12,071.38, 18,114.36 and 7,690.36 is: 11,540.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,071.38 : 18,114.36 = 7,690.36 : x
  2. Step 2: Convert to fraction form
    12,071.38/18,114.36 = 7,690.36/x
  3. Step 3: Cross multiply
    12,071.38x = 18,114.36 × 7,690.36
  4. Step 4: Simplify right side
    12,071.38x = 139,305,949.57
  5. Step 5: Solve for x
    x = 139,305,949.57/12,071.38
  6. Step 6: Final answer
    x = 11,540.18

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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.