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Finding the Fourth Proportional to 26,628, 39,942 and 7,172

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Solution

The fourth proportional to 26,628, 39,942 and 7,172 is: 10,758

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,628 : 39,942 = 7,172 : x
  2. Step 2: Convert to fraction form
    26,628/39,942 = 7,172/x
  3. Step 3: Cross multiply
    26,628x = 39,942 × 7,172
  4. Step 4: Simplify right side
    26,628x = 286,464,024
  5. Step 5: Solve for x
    x = 286,464,024/26,628
  6. Step 6: Final answer
    x = 10,758

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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.