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Finding the Fourth Proportional to 22,239, 30,690.78 and 12,303

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Solution

The fourth proportional to 22,239, 30,690.78 and 12,303 is: 16,978.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,239 : 30,690.78 = 12,303 : x
  2. Step 2: Convert to fraction form
    22,239/30,690.78 = 12,303/x
  3. Step 3: Cross multiply
    22,239x = 30,690.78 × 12,303
  4. Step 4: Simplify right side
    22,239x = 377,588,666.34
  5. Step 5: Solve for x
    x = 377,588,666.34/22,239
  6. Step 6: Final answer
    x = 16,978.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.