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Finding the Fourth Proportional to 8,391.80, 11,580.03 and 4,855.28

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Solution

The fourth proportional to 8,391.80, 11,580.03 and 4,855.28 is: 6,699.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.80 : 11,580.03 = 4,855.28 : x
  2. Step 2: Convert to fraction form
    8,391.80/11,580.03 = 4,855.28/x
  3. Step 3: Cross multiply
    8,391.80x = 11,580.03 × 4,855.28
  4. Step 4: Simplify right side
    8,391.80x = 56,224,230.16
  5. Step 5: Solve for x
    x = 56,224,230.16/8,391.80
  6. Step 6: Final answer
    x = 6,699.90

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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.