Home / 13,887.56-20,831.52-6,491

Finding the Fourth Proportional to 13,887.56, 20,831.52 and 6,491

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Solution

The fourth proportional to 13,887.56, 20,831.52 and 6,491 is: 9,736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,887.56 : 20,831.52 = 6,491 : x
  2. Step 2: Convert to fraction form
    13,887.56/20,831.52 = 6,491/x
  3. Step 3: Cross multiply
    13,887.56x = 20,831.52 × 6,491
  4. Step 4: Simplify right side
    13,887.56x = 135,217,396.32
  5. Step 5: Solve for x
    x = 135,217,396.32/13,887.56
  6. Step 6: Final answer
    x = 9,736.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.