Home / 13,865.31-19,136.12-8,205.03

Finding the Fourth Proportional to 13,865.31, 19,136.12 and 8,205.03

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Solution

The fourth proportional to 13,865.31, 19,136.12 and 8,205.03 is: 11,324.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,865.31 : 19,136.12 = 8,205.03 : x
  2. Step 2: Convert to fraction form
    13,865.31/19,136.12 = 8,205.03/x
  3. Step 3: Cross multiply
    13,865.31x = 19,136.12 × 8,205.03
  4. Step 4: Simplify right side
    13,865.31x = 157,012,397.66
  5. Step 5: Solve for x
    x = 157,012,397.66/13,865.31
  6. Step 6: Final answer
    x = 11,324.12

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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.