Home / 12,311.90-16,986.20-7,005.39

Finding the Fourth Proportional to 12,311.90, 16,986.20 and 7,005.39

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Solution

The fourth proportional to 12,311.90, 16,986.20 and 7,005.39 is: 9,665.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,311.90 : 16,986.20 = 7,005.39 : x
  2. Step 2: Convert to fraction form
    12,311.90/16,986.20 = 7,005.39/x
  3. Step 3: Cross multiply
    12,311.90x = 16,986.20 × 7,005.39
  4. Step 4: Simplify right side
    12,311.90x = 118,994,955.62
  5. Step 5: Solve for x
    x = 118,994,955.62/12,311.90
  6. Step 6: Final answer
    x = 9,665.04

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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.