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Finding the Fourth Proportional to 8,970.28, 12,383.30 and 5,386.44

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Solution

The fourth proportional to 8,970.28, 12,383.30 and 5,386.44 is: 7,435.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970.28 : 12,383.30 = 5,386.44 : x
  2. Step 2: Convert to fraction form
    8,970.28/12,383.30 = 5,386.44/x
  3. Step 3: Cross multiply
    8,970.28x = 12,383.30 × 5,386.44
  4. Step 4: Simplify right side
    8,970.28x = 66,701,902.45
  5. Step 5: Solve for x
    x = 66,701,902.45/8,970.28
  6. Step 6: Final answer
    x = 7,435.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.