Home / 21,002.30-28,982.85-11,571.20

Finding the Fourth Proportional to 21,002.30, 28,982.85 and 11,571.20

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Solution

The fourth proportional to 21,002.30, 28,982.85 and 11,571.20 is: 15,968.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.30 : 28,982.85 = 11,571.20 : x
  2. Step 2: Convert to fraction form
    21,002.30/28,982.85 = 11,571.20/x
  3. Step 3: Cross multiply
    21,002.30x = 28,982.85 × 11,571.20
  4. Step 4: Simplify right side
    21,002.30x = 335,366,353.92
  5. Step 5: Solve for x
    x = 335,366,353.92/21,002.30
  6. Step 6: Final answer
    x = 15,968.08

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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.