Home / 21,002.97-28,984.17-11,571.51

Finding the Fourth Proportional to 21,002.97, 28,984.17 and 11,571.51

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Solution

The fourth proportional to 21,002.97, 28,984.17 and 11,571.51 is: 15,968.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.97 : 28,984.17 = 11,571.51 : x
  2. Step 2: Convert to fraction form
    21,002.97/28,984.17 = 11,571.51/x
  3. Step 3: Cross multiply
    21,002.97x = 28,984.17 × 11,571.51
  4. Step 4: Simplify right side
    21,002.97x = 335,390,613.00
  5. Step 5: Solve for x
    x = 335,390,613.00/21,002.97
  6. Step 6: Final answer
    x = 15,968.72

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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.