Home / 8,967.90-13,455.81-3,128.70

Finding the Fourth Proportional to 8,967.90, 13,455.81 and 3,128.70

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Solution

The fourth proportional to 8,967.90, 13,455.81 and 3,128.70 is: 4,694.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,967.90 : 13,455.81 = 3,128.70 : x
  2. Step 2: Convert to fraction form
    8,967.90/13,455.81 = 3,128.70/x
  3. Step 3: Cross multiply
    8,967.90x = 13,455.81 × 3,128.70
  4. Step 4: Simplify right side
    8,967.90x = 42,099,192.75
  5. Step 5: Solve for x
    x = 42,099,192.75/8,967.90
  6. Step 6: Final answer
    x = 4,694.43

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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.