Home / 13,759.80-18,945.36-12,143.04

Finding the Fourth Proportional to 13,759.80, 18,945.36 and 12,143.04

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Solution

The fourth proportional to 13,759.80, 18,945.36 and 12,143.04 is: 16,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.80 : 18,945.36 = 12,143.04 : x
  2. Step 2: Convert to fraction form
    13,759.80/18,945.36 = 12,143.04/x
  3. Step 3: Cross multiply
    13,759.80x = 18,945.36 × 12,143.04
  4. Step 4: Simplify right side
    13,759.80x = 230,054,264.29
  5. Step 5: Solve for x
    x = 230,054,264.29/13,759.80
  6. Step 6: Final answer
    x = 16,719.30

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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.