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Finding the Fourth Proportional to 8,673.85, 12,991.32 and 6,720.13

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Solution

The fourth proportional to 8,673.85, 12,991.32 and 6,720.13 is: 10,065.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,673.85 : 12,991.32 = 6,720.13 : x
  2. Step 2: Convert to fraction form
    8,673.85/12,991.32 = 6,720.13/x
  3. Step 3: Cross multiply
    8,673.85x = 12,991.32 × 6,720.13
  4. Step 4: Simplify right side
    8,673.85x = 87,303,359.27
  5. Step 5: Solve for x
    x = 87,303,359.27/8,673.85
  6. Step 6: Final answer
    x = 10,065.12

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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.