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Finding the Fourth Proportional to 16,628, 24,942 and 8,420

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Solution

The fourth proportional to 16,628, 24,942 and 8,420 is: 12,630

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,628 : 24,942 = 8,420 : x
  2. Step 2: Convert to fraction form
    16,628/24,942 = 8,420/x
  3. Step 3: Cross multiply
    16,628x = 24,942 × 8,420
  4. Step 4: Simplify right side
    16,628x = 210,011,640
  5. Step 5: Solve for x
    x = 210,011,640/16,628
  6. Step 6: Final answer
    x = 12,630

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.