Home / 13,199.68-18,215.56-7,231.36

Finding the Fourth Proportional to 13,199.68, 18,215.56 and 7,231.36

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Solution

The fourth proportional to 13,199.68, 18,215.56 and 7,231.36 is: 9,979.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.68 : 18,215.56 = 7,231.36 : x
  2. Step 2: Convert to fraction form
    13,199.68/18,215.56 = 7,231.36/x
  3. Step 3: Cross multiply
    13,199.68x = 18,215.56 × 7,231.36
  4. Step 4: Simplify right side
    13,199.68x = 131,723,271.96
  5. Step 5: Solve for x
    x = 131,723,271.96/13,199.68
  6. Step 6: Final answer
    x = 9,979.28

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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.