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Finding the Fourth Proportional to 12,993.70, 19,498.00 and 12,887.99

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Solution

The fourth proportional to 12,993.70, 19,498.00 and 12,887.99 is: 19,339.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,993.70 : 19,498.00 = 12,887.99 : x
  2. Step 2: Convert to fraction form
    12,993.70/19,498.00 = 12,887.99/x
  3. Step 3: Cross multiply
    12,993.70x = 19,498.00 × 12,887.99
  4. Step 4: Simplify right side
    12,993.70x = 251,290,106.27
  5. Step 5: Solve for x
    x = 251,290,106.27/12,993.70
  6. Step 6: Final answer
    x = 19,339.38

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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.