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Finding the Fourth Proportional to 6,683.40, 9,214.02 and 6,391.80

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Solution

The fourth proportional to 6,683.40, 9,214.02 and 6,391.80 is: 8,812.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,683.40 : 9,214.02 = 6,391.80 : x
  2. Step 2: Convert to fraction form
    6,683.40/9,214.02 = 6,391.80/x
  3. Step 3: Cross multiply
    6,683.40x = 9,214.02 × 6,391.80
  4. Step 4: Simplify right side
    6,683.40x = 58,894,173.04
  5. Step 5: Solve for x
    x = 58,894,173.04/6,683.40
  6. Step 6: Final answer
    x = 8,812.01

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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.