Home / 18,861.79-28,292.68-4,821.85

Finding the Fourth Proportional to 18,861.79, 28,292.68 and 4,821.85

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Solution

The fourth proportional to 18,861.79, 28,292.68 and 4,821.85 is: 7,232.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.79 : 28,292.68 = 4,821.85 : x
  2. Step 2: Convert to fraction form
    18,861.79/28,292.68 = 4,821.85/x
  3. Step 3: Cross multiply
    18,861.79x = 28,292.68 × 4,821.85
  4. Step 4: Simplify right side
    18,861.79x = 136,423,059.06
  5. Step 5: Solve for x
    x = 136,423,059.06/18,861.79
  6. Step 6: Final answer
    x = 7,232.77

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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.