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Finding the Fourth Proportional to 12,669.70, 19,004.55 and 3,435.70

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Solution

The fourth proportional to 12,669.70, 19,004.55 and 3,435.70 is: 5,153.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,669.70 : 19,004.55 = 3,435.70 : x
  2. Step 2: Convert to fraction form
    12,669.70/19,004.55 = 3,435.70/x
  3. Step 3: Cross multiply
    12,669.70x = 19,004.55 × 3,435.70
  4. Step 4: Simplify right side
    12,669.70x = 65,293,932.44
  5. Step 5: Solve for x
    x = 65,293,932.44/12,669.70
  6. Step 6: Final answer
    x = 5,153.55

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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.