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Finding the Fourth Proportional to 7,618.54, 11,394.99 and 6,780.19

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Solution

The fourth proportional to 7,618.54, 11,394.99 and 6,780.19 is: 10,141.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,618.54 : 11,394.99 = 6,780.19 : x
  2. Step 2: Convert to fraction form
    7,618.54/11,394.99 = 6,780.19/x
  3. Step 3: Cross multiply
    7,618.54x = 11,394.99 × 6,780.19
  4. Step 4: Simplify right side
    7,618.54x = 77,260,168.76
  5. Step 5: Solve for x
    x = 77,260,168.76/7,618.54
  6. Step 6: Final answer
    x = 10,141.08

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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.