Home / 12,980.36-17,912.21-7,315.12

Finding the Fourth Proportional to 12,980.36, 17,912.21 and 7,315.12

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Solution

The fourth proportional to 12,980.36, 17,912.21 and 7,315.12 is: 10,094.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.36 : 17,912.21 = 7,315.12 : x
  2. Step 2: Convert to fraction form
    12,980.36/17,912.21 = 7,315.12/x
  3. Step 3: Cross multiply
    12,980.36x = 17,912.21 × 7,315.12
  4. Step 4: Simplify right side
    12,980.36x = 131,029,965.62
  5. Step 5: Solve for x
    x = 131,029,965.62/12,980.36
  6. Step 6: Final answer
    x = 10,094.48

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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.