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Finding the Fourth Proportional to 17,720.80, 26,571.60 and 7,320.80

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Solution

The fourth proportional to 17,720.80, 26,571.60 and 7,320.80 is: 10,977.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,720.80 : 26,571.60 = 7,320.80 : x
  2. Step 2: Convert to fraction form
    17,720.80/26,571.60 = 7,320.80/x
  3. Step 3: Cross multiply
    17,720.80x = 26,571.60 × 7,320.80
  4. Step 4: Simplify right side
    17,720.80x = 194,525,369.28
  5. Step 5: Solve for x
    x = 194,525,369.28/17,720.80
  6. Step 6: Final answer
    x = 10,977.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.