Home / 21,336.06-29,433.36-13,788.90

Finding the Fourth Proportional to 21,336.06, 29,433.36 and 13,788.90

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Solution

The fourth proportional to 21,336.06, 29,433.36 and 13,788.90 is: 19,021.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.06 : 29,433.36 = 13,788.90 : x
  2. Step 2: Convert to fraction form
    21,336.06/29,433.36 = 13,788.90/x
  3. Step 3: Cross multiply
    21,336.06x = 29,433.36 × 13,788.90
  4. Step 4: Simplify right side
    21,336.06x = 405,853,657.70
  5. Step 5: Solve for x
    x = 405,853,657.70/21,336.06
  6. Step 6: Final answer
    x = 19,021.96

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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.