Home / 21,661.48-29,894.85-13,161.64

Finding the Fourth Proportional to 21,661.48, 29,894.85 and 13,161.64

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Solution

The fourth proportional to 21,661.48, 29,894.85 and 13,161.64 is: 18,164.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.48 : 29,894.85 = 13,161.64 : x
  2. Step 2: Convert to fraction form
    21,661.48/29,894.85 = 13,161.64/x
  3. Step 3: Cross multiply
    21,661.48x = 29,894.85 × 13,161.64
  4. Step 4: Simplify right side
    21,661.48x = 393,465,197.85
  5. Step 5: Solve for x
    x = 393,465,197.85/21,661.48
  6. Step 6: Final answer
    x = 18,164.28

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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.