Home / 13,181.84-18,191.42-7,515.68

Finding the Fourth Proportional to 13,181.84, 18,191.42 and 7,515.68

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Solution

The fourth proportional to 13,181.84, 18,191.42 and 7,515.68 is: 10,371.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.84 : 18,191.42 = 7,515.68 : x
  2. Step 2: Convert to fraction form
    13,181.84/18,191.42 = 7,515.68/x
  3. Step 3: Cross multiply
    13,181.84x = 18,191.42 × 7,515.68
  4. Step 4: Simplify right side
    13,181.84x = 136,720,791.11
  5. Step 5: Solve for x
    x = 136,720,791.11/13,181.84
  6. Step 6: Final answer
    x = 10,371.91

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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.