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Finding the Fourth Proportional to 6,984.69, 9,638.84 and 3,840.81

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Solution

The fourth proportional to 6,984.69, 9,638.84 and 3,840.81 is: 5,300.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,984.69 : 9,638.84 = 3,840.81 : x
  2. Step 2: Convert to fraction form
    6,984.69/9,638.84 = 3,840.81/x
  3. Step 3: Cross multiply
    6,984.69x = 9,638.84 × 3,840.81
  4. Step 4: Simplify right side
    6,984.69x = 37,020,933.86
  5. Step 5: Solve for x
    x = 37,020,933.86/6,984.69
  6. Step 6: Final answer
    x = 5,300.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.