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Finding the Fourth Proportional to 40,570, 60,855 and 12,868

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Solution

The fourth proportional to 40,570, 60,855 and 12,868 is: 19,302

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,570 : 60,855 = 12,868 : x
  2. Step 2: Convert to fraction form
    40,570/60,855 = 12,868/x
  3. Step 3: Cross multiply
    40,570x = 60,855 × 12,868
  4. Step 4: Simplify right side
    40,570x = 783,082,140
  5. Step 5: Solve for x
    x = 783,082,140/40,570
  6. Step 6: Final answer
    x = 19,302

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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.