Home / 21,290.80-29,364.54-18,491.44

Finding the Fourth Proportional to 21,290.80, 29,364.54 and 18,491.44

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Solution

The fourth proportional to 21,290.80, 29,364.54 and 18,491.44 is: 25,503.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.80 : 29,364.54 = 18,491.44 : x
  2. Step 2: Convert to fraction form
    21,290.80/29,364.54 = 18,491.44/x
  3. Step 3: Cross multiply
    21,290.80x = 29,364.54 × 18,491.44
  4. Step 4: Simplify right side
    21,290.80x = 542,992,629.54
  5. Step 5: Solve for x
    x = 542,992,629.54/21,290.80
  6. Step 6: Final answer
    x = 25,503.63

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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.