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Finding the Fourth Proportional to 8,966.28, 13,453.28 and 3,421.28

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Solution

The fourth proportional to 8,966.28, 13,453.28 and 3,421.28 is: 5,133.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,966.28 : 13,453.28 = 3,421.28 : x
  2. Step 2: Convert to fraction form
    8,966.28/13,453.28 = 3,421.28/x
  3. Step 3: Cross multiply
    8,966.28x = 13,453.28 × 3,421.28
  4. Step 4: Simplify right side
    8,966.28x = 46,027,437.80
  5. Step 5: Solve for x
    x = 46,027,437.80/8,966.28
  6. Step 6: Final answer
    x = 5,133.39

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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.