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Finding the Fourth Proportional to 19,994.20, 30,012.90 and 11,246.20

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Solution

The fourth proportional to 19,994.20, 30,012.90 and 11,246.20 is: 16,881.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,994.20 : 30,012.90 = 11,246.20 : x
  2. Step 2: Convert to fraction form
    19,994.20/30,012.90 = 11,246.20/x
  3. Step 3: Cross multiply
    19,994.20x = 30,012.90 × 11,246.20
  4. Step 4: Simplify right side
    19,994.20x = 337,531,075.98
  5. Step 5: Solve for x
    x = 337,531,075.98/19,994.20
  6. Step 6: Final answer
    x = 16,881.45

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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.