Home / 13,171.38-19,831.70-11,621.58

Finding the Fourth Proportional to 13,171.38, 19,831.70 and 11,621.58

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Solution

The fourth proportional to 13,171.38, 19,831.70 and 11,621.58 is: 17,498.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,171.38 : 19,831.70 = 11,621.58 : x
  2. Step 2: Convert to fraction form
    13,171.38/19,831.70 = 11,621.58/x
  3. Step 3: Cross multiply
    13,171.38x = 19,831.70 × 11,621.58
  4. Step 4: Simplify right side
    13,171.38x = 230,475,629.98
  5. Step 5: Solve for x
    x = 230,475,629.98/13,171.38
  6. Step 6: Final answer
    x = 17,498.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.