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Finding the Fourth Proportional to 28,606, 42,909.06 and 12,190

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Solution

The fourth proportional to 28,606, 42,909.06 and 12,190 is: 18,285.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,606 : 42,909.06 = 12,190 : x
  2. Step 2: Convert to fraction form
    28,606/42,909.06 = 12,190/x
  3. Step 3: Cross multiply
    28,606x = 42,909.06 × 12,190
  4. Step 4: Simplify right side
    28,606x = 523,061,441.40
  5. Step 5: Solve for x
    x = 523,061,441.40/28,606
  6. Step 6: Final answer
    x = 18,285.03

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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.