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Finding the Fourth Proportional to 12,019.86, 18,029.79 and 5,089.50

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Solution

The fourth proportional to 12,019.86, 18,029.79 and 5,089.50 is: 7,634.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,019.86 : 18,029.79 = 5,089.50 : x
  2. Step 2: Convert to fraction form
    12,019.86/18,029.79 = 5,089.50/x
  3. Step 3: Cross multiply
    12,019.86x = 18,029.79 × 5,089.50
  4. Step 4: Simplify right side
    12,019.86x = 91,762,616.21
  5. Step 5: Solve for x
    x = 91,762,616.21/12,019.86
  6. Step 6: Final answer
    x = 7,634.25

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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.