Home / 13,720.46-18,920.39-11,194.47

Finding the Fourth Proportional to 13,720.46, 18,920.39 and 11,194.47

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Solution

The fourth proportional to 13,720.46, 18,920.39 and 11,194.47 is: 15,437.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.46 : 18,920.39 = 11,194.47 : x
  2. Step 2: Convert to fraction form
    13,720.46/18,920.39 = 11,194.47/x
  3. Step 3: Cross multiply
    13,720.46x = 18,920.39 × 11,194.47
  4. Step 4: Simplify right side
    13,720.46x = 211,803,682.27
  5. Step 5: Solve for x
    x = 211,803,682.27/13,720.46
  6. Step 6: Final answer
    x = 15,437.07

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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.