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Finding the Fourth Proportional to 8,671.90, 12,995.06 and 3,980.34

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Solution

The fourth proportional to 8,671.90, 12,995.06 and 3,980.34 is: 5,964.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.90 : 12,995.06 = 3,980.34 : x
  2. Step 2: Convert to fraction form
    8,671.90/12,995.06 = 3,980.34/x
  3. Step 3: Cross multiply
    8,671.90x = 12,995.06 × 3,980.34
  4. Step 4: Simplify right side
    8,671.90x = 51,724,757.12
  5. Step 5: Solve for x
    x = 51,724,757.12/8,671.90
  6. Step 6: Final answer
    x = 5,964.64

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1.5x scale

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.