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Finding the Fourth Proportional to 21,002.93, 28,984.03 and 11,571.49

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Solution

The fourth proportional to 21,002.93, 28,984.03 and 11,571.49 is: 15,968.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.93 : 28,984.03 = 11,571.49 : x
  2. Step 2: Convert to fraction form
    21,002.93/28,984.03 = 11,571.49/x
  3. Step 3: Cross multiply
    21,002.93x = 28,984.03 × 11,571.49
  4. Step 4: Simplify right side
    21,002.93x = 335,388,420.61
  5. Step 5: Solve for x
    x = 335,388,420.61/21,002.93
  6. Step 6: Final answer
    x = 15,968.65

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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.