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Finding the Fourth Proportional to 8,976.80, 13,348.90 and 8,699.60

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Solution

The fourth proportional to 8,976.80, 13,348.90 and 8,699.60 is: 12,936.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.80 : 13,348.90 = 8,699.60 : x
  2. Step 2: Convert to fraction form
    8,976.80/13,348.90 = 8,699.60/x
  3. Step 3: Cross multiply
    8,976.80x = 13,348.90 × 8,699.60
  4. Step 4: Simplify right side
    8,976.80x = 116,130,090.44
  5. Step 5: Solve for x
    x = 116,130,090.44/8,976.80
  6. Step 6: Final answer
    x = 12,936.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.