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Finding the Fourth Proportional to 21,626, 32,439 and 5,210

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Solution

The fourth proportional to 21,626, 32,439 and 5,210 is: 7,815

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,626 : 32,439 = 5,210 : x
  2. Step 2: Convert to fraction form
    21,626/32,439 = 5,210/x
  3. Step 3: Cross multiply
    21,626x = 32,439 × 5,210
  4. Step 4: Simplify right side
    21,626x = 169,007,190
  5. Step 5: Solve for x
    x = 169,007,190/21,626
  6. Step 6: Final answer
    x = 7,815

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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.