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Finding the Fourth Proportional to 6,991.40, 10,491.96 and 4,520.10

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Solution

The fourth proportional to 6,991.40, 10,491.96 and 4,520.10 is: 6,783.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.40 : 10,491.96 = 4,520.10 : x
  2. Step 2: Convert to fraction form
    6,991.40/10,491.96 = 4,520.10/x
  3. Step 3: Cross multiply
    6,991.40x = 10,491.96 × 4,520.10
  4. Step 4: Simplify right side
    6,991.40x = 47,424,708.40
  5. Step 5: Solve for x
    x = 47,424,708.40/6,991.40
  6. Step 6: Final answer
    x = 6,783.29

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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.