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Finding the Fourth Proportional to 12,811.50, 19,220.49 and 3,577.50

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Solution

The fourth proportional to 12,811.50, 19,220.49 and 3,577.50 is: 5,367.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.50 : 19,220.49 = 3,577.50 : x
  2. Step 2: Convert to fraction form
    12,811.50/19,220.49 = 3,577.50/x
  3. Step 3: Cross multiply
    12,811.50x = 19,220.49 × 3,577.50
  4. Step 4: Simplify right side
    12,811.50x = 68,761,302.98
  5. Step 5: Solve for x
    x = 68,761,302.98/12,811.50
  6. Step 6: Final answer
    x = 5,367.15

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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.