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Finding the Fourth Proportional to 8,918.40, 12,308.28 and 6,676.32

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Solution

The fourth proportional to 8,918.40, 12,308.28 and 6,676.32 is: 9,213.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.40 : 12,308.28 = 6,676.32 : x
  2. Step 2: Convert to fraction form
    8,918.40/12,308.28 = 6,676.32/x
  3. Step 3: Cross multiply
    8,918.40x = 12,308.28 × 6,676.32
  4. Step 4: Simplify right side
    8,918.40x = 82,174,015.93
  5. Step 5: Solve for x
    x = 82,174,015.93/8,918.40
  6. Step 6: Final answer
    x = 9,213.99

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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.