Home / 13,215.96-18,231.48-7,908.84

Finding the Fourth Proportional to 13,215.96, 18,231.48 and 7,908.84

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Solution

The fourth proportional to 13,215.96, 18,231.48 and 7,908.84 is: 10,910.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.96 : 18,231.48 = 7,908.84 : x
  2. Step 2: Convert to fraction form
    13,215.96/18,231.48 = 7,908.84/x
  3. Step 3: Cross multiply
    13,215.96x = 18,231.48 × 7,908.84
  4. Step 4: Simplify right side
    13,215.96x = 144,189,858.28
  5. Step 5: Solve for x
    x = 144,189,858.28/13,215.96
  6. Step 6: Final answer
    x = 10,910.28

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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.