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Finding the Fourth Proportional to 8,919.05, 13,437.90 and 8,075.30

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Solution

The fourth proportional to 8,919.05, 13,437.90 and 8,075.30 is: 12,166.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.05 : 13,437.90 = 8,075.30 : x
  2. Step 2: Convert to fraction form
    8,919.05/13,437.90 = 8,075.30/x
  3. Step 3: Cross multiply
    8,919.05x = 13,437.90 × 8,075.30
  4. Step 4: Simplify right side
    8,919.05x = 108,515,006.68
  5. Step 5: Solve for x
    x = 108,515,006.68/8,919.05
  6. Step 6: Final answer
    x = 12,166.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.