Home / 21,125.80-29,167.86-18,880.48

Finding the Fourth Proportional to 21,125.80, 29,167.86 and 18,880.48

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Solution

The fourth proportional to 21,125.80, 29,167.86 and 18,880.48 is: 26,067.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.80 : 29,167.86 = 18,880.48 : x
  2. Step 2: Convert to fraction form
    21,125.80/29,167.86 = 18,880.48/x
  3. Step 3: Cross multiply
    21,125.80x = 29,167.86 × 18,880.48
  4. Step 4: Simplify right side
    21,125.80x = 550,703,197.37
  5. Step 5: Solve for x
    x = 550,703,197.37/21,125.80
  6. Step 6: Final answer
    x = 26,067.80

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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.