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Finding the Fourth Proportional to 12,690.99, 19,035.54 and 6,758.73

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Solution

The fourth proportional to 12,690.99, 19,035.54 and 6,758.73 is: 10,137.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.99 : 19,035.54 = 6,758.73 : x
  2. Step 2: Convert to fraction form
    12,690.99/19,035.54 = 6,758.73/x
  3. Step 3: Cross multiply
    12,690.99x = 19,035.54 × 6,758.73
  4. Step 4: Simplify right side
    12,690.99x = 128,656,075.26
  5. Step 5: Solve for x
    x = 128,656,075.26/12,690.99
  6. Step 6: Final answer
    x = 10,137.59

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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.