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Finding the Fourth Proportional to 30,679.56, 46,021.95 and 8,492.94

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Solution

The fourth proportional to 30,679.56, 46,021.95 and 8,492.94 is: 12,740.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,679.56 : 46,021.95 = 8,492.94 : x
  2. Step 2: Convert to fraction form
    30,679.56/46,021.95 = 8,492.94/x
  3. Step 3: Cross multiply
    30,679.56x = 46,021.95 × 8,492.94
  4. Step 4: Simplify right side
    30,679.56x = 390,861,660.03
  5. Step 5: Solve for x
    x = 390,861,660.03/30,679.56
  6. Step 6: Final answer
    x = 12,740.13

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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.