Home / 12,912.11-17,819.30-10,112.75

Finding the Fourth Proportional to 12,912.11, 17,819.30 and 10,112.75

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Solution

The fourth proportional to 12,912.11, 17,819.30 and 10,112.75 is: 13,956.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.11 : 17,819.30 = 10,112.75 : x
  2. Step 2: Convert to fraction form
    12,912.11/17,819.30 = 10,112.75/x
  3. Step 3: Cross multiply
    12,912.11x = 17,819.30 × 10,112.75
  4. Step 4: Simplify right side
    12,912.11x = 180,202,075.51
  5. Step 5: Solve for x
    x = 180,202,075.51/12,912.11
  6. Step 6: Final answer
    x = 13,956.05

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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.