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Finding the Fourth Proportional to 12,994.70, 19,499.50 and 12,888.99

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Solution

The fourth proportional to 12,994.70, 19,499.50 and 12,888.99 is: 19,340.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,994.70 : 19,499.50 = 12,888.99 : x
  2. Step 2: Convert to fraction form
    12,994.70/19,499.50 = 12,888.99/x
  3. Step 3: Cross multiply
    12,994.70x = 19,499.50 × 12,888.99
  4. Step 4: Simplify right side
    12,994.70x = 251,328,860.51
  5. Step 5: Solve for x
    x = 251,328,860.51/12,994.70
  6. Step 6: Final answer
    x = 19,340.87

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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.