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Finding the Fourth Proportional to 6,984.99, 10,481.25 and 5,428.12

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Solution

The fourth proportional to 6,984.99, 10,481.25 and 5,428.12 is: 8,145.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,984.99 : 10,481.25 = 5,428.12 : x
  2. Step 2: Convert to fraction form
    6,984.99/10,481.25 = 5,428.12/x
  3. Step 3: Cross multiply
    6,984.99x = 10,481.25 × 5,428.12
  4. Step 4: Simplify right side
    6,984.99x = 56,893,482.75
  5. Step 5: Solve for x
    x = 56,893,482.75/6,984.99
  6. Step 6: Final answer
    x = 8,145.11

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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.