Home / 21,296.71-29,370.36-13,339.81

Finding the Fourth Proportional to 21,296.71, 29,370.36 and 13,339.81

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Solution

The fourth proportional to 21,296.71, 29,370.36 and 13,339.81 is: 18,396.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,296.71 : 29,370.36 = 13,339.81 : x
  2. Step 2: Convert to fraction form
    21,296.71/29,370.36 = 13,339.81/x
  3. Step 3: Cross multiply
    21,296.71x = 29,370.36 × 13,339.81
  4. Step 4: Simplify right side
    21,296.71x = 391,795,022.03
  5. Step 5: Solve for x
    x = 391,795,022.03/21,296.71
  6. Step 6: Final answer
    x = 18,396.97

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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.