Home / 21,370.71-29,491.56-11,811.32

Finding the Fourth Proportional to 21,370.71, 29,491.56 and 11,811.32

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Solution

The fourth proportional to 21,370.71, 29,491.56 and 11,811.32 is: 16,299.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.71 : 29,491.56 = 11,811.32 : x
  2. Step 2: Convert to fraction form
    21,370.71/29,491.56 = 11,811.32/x
  3. Step 3: Cross multiply
    21,370.71x = 29,491.56 × 11,811.32
  4. Step 4: Simplify right side
    21,370.71x = 348,334,105.00
  5. Step 5: Solve for x
    x = 348,334,105.00/21,370.71
  6. Step 6: Final answer
    x = 16,299.60

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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.