Home / 12,690.40-17,512.36-7,025.38

Finding the Fourth Proportional to 12,690.40, 17,512.36 and 7,025.38

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Solution

The fourth proportional to 12,690.40, 17,512.36 and 7,025.38 is: 9,694.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.40 : 17,512.36 = 7,025.38 : x
  2. Step 2: Convert to fraction form
    12,690.40/17,512.36 = 7,025.38/x
  3. Step 3: Cross multiply
    12,690.40x = 17,512.36 × 7,025.38
  4. Step 4: Simplify right side
    12,690.40x = 123,030,983.70
  5. Step 5: Solve for x
    x = 123,030,983.70/12,690.40
  6. Step 6: Final answer
    x = 9,694.81

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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.