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Finding the Fourth Proportional to 12,762, 19,145.88 and 3,996

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Solution

The fourth proportional to 12,762, 19,145.88 and 3,996 is: 5,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,762 : 19,145.88 = 3,996 : x
  2. Step 2: Convert to fraction form
    12,762/19,145.88 = 3,996/x
  3. Step 3: Cross multiply
    12,762x = 19,145.88 × 3,996
  4. Step 4: Simplify right side
    12,762x = 76,506,936.48
  5. Step 5: Solve for x
    x = 76,506,936.48/12,762
  6. Step 6: Final answer
    x = 5,994.90

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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.