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Finding the Fourth Proportional to 18,842.54, 28,263.76 and 7,741.40

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Solution

The fourth proportional to 18,842.54, 28,263.76 and 7,741.40 is: 11,612.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.54 : 28,263.76 = 7,741.40 : x
  2. Step 2: Convert to fraction form
    18,842.54/28,263.76 = 7,741.40/x
  3. Step 3: Cross multiply
    18,842.54x = 28,263.76 × 7,741.40
  4. Step 4: Simplify right side
    18,842.54x = 218,800,910.99
  5. Step 5: Solve for x
    x = 218,800,910.99/18,842.54
  6. Step 6: Final answer
    x = 11,612.07

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1.5x scale

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.