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Finding the Fourth Proportional to 40,381, 60,572.04 and 12,679

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Solution

The fourth proportional to 40,381, 60,572.04 and 12,679 is: 19,018.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,381 : 60,572.04 = 12,679 : x
  2. Step 2: Convert to fraction form
    40,381/60,572.04 = 12,679/x
  3. Step 3: Cross multiply
    40,381x = 60,572.04 × 12,679
  4. Step 4: Simplify right side
    40,381x = 767,992,895.16
  5. Step 5: Solve for x
    x = 767,992,895.16/40,381
  6. Step 6: Final answer
    x = 19,018.67

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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.