Home / 20,831.36-28,732.24-13,270.24

Finding the Fourth Proportional to 20,831.36, 28,732.24 and 13,270.24

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Solution

The fourth proportional to 20,831.36, 28,732.24 and 13,270.24 is: 18,303.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.36 : 28,732.24 = 13,270.24 : x
  2. Step 2: Convert to fraction form
    20,831.36/28,732.24 = 13,270.24/x
  3. Step 3: Cross multiply
    20,831.36x = 28,732.24 × 13,270.24
  4. Step 4: Simplify right side
    20,831.36x = 381,283,720.54
  5. Step 5: Solve for x
    x = 381,283,720.54/20,831.36
  6. Step 6: Final answer
    x = 18,303.35

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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.