Home / 13,782.31-19,018.11-8,116.72

Finding the Fourth Proportional to 13,782.31, 19,018.11 and 8,116.72

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Solution

The fourth proportional to 13,782.31, 19,018.11 and 8,116.72 is: 11,200.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,782.31 : 19,018.11 = 8,116.72 : x
  2. Step 2: Convert to fraction form
    13,782.31/19,018.11 = 8,116.72/x
  3. Step 3: Cross multiply
    13,782.31x = 19,018.11 × 8,116.72
  4. Step 4: Simplify right side
    13,782.31x = 154,364,673.80
  5. Step 5: Solve for x
    x = 154,364,673.80/13,782.31
  6. Step 6: Final answer
    x = 11,200.20

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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.