Home / 21,002.88-28,983.96-11,571.42

Finding the Fourth Proportional to 21,002.88, 28,983.96 and 11,571.42

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Solution

The fourth proportional to 21,002.88, 28,983.96 and 11,571.42 is: 15,968.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.88 : 28,983.96 = 11,571.42 : x
  2. Step 2: Convert to fraction form
    21,002.88/28,983.96 = 11,571.42/x
  3. Step 3: Cross multiply
    21,002.88x = 28,983.96 × 11,571.42
  4. Step 4: Simplify right side
    21,002.88x = 335,385,574.42
  5. Step 5: Solve for x
    x = 335,385,574.42/21,002.88
  6. Step 6: Final answer
    x = 15,968.55

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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.