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Finding the Fourth Proportional to 11,075.70, 16,625.70 and 6,920.40

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Solution

The fourth proportional to 11,075.70, 16,625.70 and 6,920.40 is: 10,388.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,075.70 : 16,625.70 = 6,920.40 : x
  2. Step 2: Convert to fraction form
    11,075.70/16,625.70 = 6,920.40/x
  3. Step 3: Cross multiply
    11,075.70x = 16,625.70 × 6,920.40
  4. Step 4: Simplify right side
    11,075.70x = 115,056,494.28
  5. Step 5: Solve for x
    x = 115,056,494.28/11,075.70
  6. Step 6: Final answer
    x = 10,388.19

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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.