Home / 28,021.22-38,668.78-15,274.51

Finding the Fourth Proportional to 28,021.22, 38,668.78 and 15,274.51

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Solution

The fourth proportional to 28,021.22, 38,668.78 and 15,274.51 is: 21,078.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,021.22 : 38,668.78 = 15,274.51 : x
  2. Step 2: Convert to fraction form
    28,021.22/38,668.78 = 15,274.51/x
  3. Step 3: Cross multiply
    28,021.22x = 38,668.78 × 15,274.51
  4. Step 4: Simplify right side
    28,021.22x = 590,646,666.80
  5. Step 5: Solve for x
    x = 590,646,666.80/28,021.22
  6. Step 6: Final answer
    x = 21,078.55

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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.