Home / 13,199.10-18,213.03-7,891.98

Finding the Fourth Proportional to 13,199.10, 18,213.03 and 7,891.98

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Solution

The fourth proportional to 13,199.10, 18,213.03 and 7,891.98 is: 10,889.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.10 : 18,213.03 = 7,891.98 : x
  2. Step 2: Convert to fraction form
    13,199.10/18,213.03 = 7,891.98/x
  3. Step 3: Cross multiply
    13,199.10x = 18,213.03 × 7,891.98
  4. Step 4: Simplify right side
    13,199.10x = 143,736,868.50
  5. Step 5: Solve for x
    x = 143,736,868.50/13,199.10
  6. Step 6: Final answer
    x = 10,889.90

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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.