Home / 21,216.71-29,279.07-11,657.22

Finding the Fourth Proportional to 21,216.71, 29,279.07 and 11,657.22

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Solution

The fourth proportional to 21,216.71, 29,279.07 and 11,657.22 is: 16,086.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.71 : 29,279.07 = 11,657.22 : x
  2. Step 2: Convert to fraction form
    21,216.71/29,279.07 = 11,657.22/x
  3. Step 3: Cross multiply
    21,216.71x = 29,279.07 × 11,657.22
  4. Step 4: Simplify right side
    21,216.71x = 341,312,450.59
  5. Step 5: Solve for x
    x = 341,312,450.59/21,216.71
  6. Step 6: Final answer
    x = 16,086.96

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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.