Home / 21,863.07-30,172.68-13,366.80

Finding the Fourth Proportional to 21,863.07, 30,172.68 and 13,366.80

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Solution

The fourth proportional to 21,863.07, 30,172.68 and 13,366.80 is: 18,447.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.07 : 30,172.68 = 13,366.80 : x
  2. Step 2: Convert to fraction form
    21,863.07/30,172.68 = 13,366.80/x
  3. Step 3: Cross multiply
    21,863.07x = 30,172.68 × 13,366.80
  4. Step 4: Simplify right side
    21,863.07x = 403,312,179.02
  5. Step 5: Solve for x
    x = 403,312,179.02/21,863.07
  6. Step 6: Final answer
    x = 18,447.19

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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.