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Finding the Fourth Proportional to 8,690.80, 13,003.80 and 5,774.80

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Solution

The fourth proportional to 8,690.80, 13,003.80 and 5,774.80 is: 8,640.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.80 : 13,003.80 = 5,774.80 : x
  2. Step 2: Convert to fraction form
    8,690.80/13,003.80 = 5,774.80/x
  3. Step 3: Cross multiply
    8,690.80x = 13,003.80 × 5,774.80
  4. Step 4: Simplify right side
    8,690.80x = 75,094,344.24
  5. Step 5: Solve for x
    x = 75,094,344.24/8,690.80
  6. Step 6: Final answer
    x = 8,640.67

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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.