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Finding the Fourth Proportional to 7,383.80, 11,075.70 and 7,092.20

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Solution

The fourth proportional to 7,383.80, 11,075.70 and 7,092.20 is: 10,638.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,383.80 : 11,075.70 = 7,092.20 : x
  2. Step 2: Convert to fraction form
    7,383.80/11,075.70 = 7,092.20/x
  3. Step 3: Cross multiply
    7,383.80x = 11,075.70 × 7,092.20
  4. Step 4: Simplify right side
    7,383.80x = 78,551,079.54
  5. Step 5: Solve for x
    x = 78,551,079.54/7,383.80
  6. Step 6: Final answer
    x = 10,638.30

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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.