Home / 21,131.15-29,165.54-13,583.57

Finding the Fourth Proportional to 21,131.15, 29,165.54 and 13,583.57

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Solution

The fourth proportional to 21,131.15, 29,165.54 and 13,583.57 is: 18,748.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.15 : 29,165.54 = 13,583.57 : x
  2. Step 2: Convert to fraction form
    21,131.15/29,165.54 = 13,583.57/x
  3. Step 3: Cross multiply
    21,131.15x = 29,165.54 × 13,583.57
  4. Step 4: Simplify right side
    21,131.15x = 396,171,940.43
  5. Step 5: Solve for x
    x = 396,171,940.43/21,131.15
  6. Step 6: Final answer
    x = 18,748.25

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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.