Home / 13,415.22-18,513.89-7,750.22

Finding the Fourth Proportional to 13,415.22, 18,513.89 and 7,750.22

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Solution

The fourth proportional to 13,415.22, 18,513.89 and 7,750.22 is: 10,695.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.22 : 18,513.89 = 7,750.22 : x
  2. Step 2: Convert to fraction form
    13,415.22/18,513.89 = 7,750.22/x
  3. Step 3: Cross multiply
    13,415.22x = 18,513.89 × 7,750.22
  4. Step 4: Simplify right side
    13,415.22x = 143,486,589.24
  5. Step 5: Solve for x
    x = 143,486,589.24/13,415.22
  6. Step 6: Final answer
    x = 10,695.81

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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.