Home / 13,782.12-19,020.74-8,118.66

Finding the Fourth Proportional to 13,782.12, 19,020.74 and 8,118.66

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Solution

The fourth proportional to 13,782.12, 19,020.74 and 8,118.66 is: 11,204.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,782.12 : 19,020.74 = 8,118.66 : x
  2. Step 2: Convert to fraction form
    13,782.12/19,020.74 = 8,118.66/x
  3. Step 3: Cross multiply
    13,782.12x = 19,020.74 × 8,118.66
  4. Step 4: Simplify right side
    13,782.12x = 154,422,825.90
  5. Step 5: Solve for x
    x = 154,422,825.90/13,782.12
  6. Step 6: Final answer
    x = 11,204.58

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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.