Home / 13,720.43-18,947.66-11,719.33

Finding the Fourth Proportional to 13,720.43, 18,947.66 and 11,719.33

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Solution

The fourth proportional to 13,720.43, 18,947.66 and 11,719.33 is: 16,184.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.43 : 18,947.66 = 11,719.33 : x
  2. Step 2: Convert to fraction form
    13,720.43/18,947.66 = 11,719.33/x
  3. Step 3: Cross multiply
    13,720.43x = 18,947.66 × 11,719.33
  4. Step 4: Simplify right side
    13,720.43x = 222,053,774.30
  5. Step 5: Solve for x
    x = 222,053,774.30/13,720.43
  6. Step 6: Final answer
    x = 16,184.17

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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.