Home / 12,078.61-18,114.63-3,311.44

Finding the Fourth Proportional to 12,078.61, 18,114.63 and 3,311.44

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Solution

The fourth proportional to 12,078.61, 18,114.63 and 3,311.44 is: 4,966.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.61 : 18,114.63 = 3,311.44 : x
  2. Step 2: Convert to fraction form
    12,078.61/18,114.63 = 3,311.44/x
  3. Step 3: Cross multiply
    12,078.61x = 18,114.63 × 3,311.44
  4. Step 4: Simplify right side
    12,078.61x = 59,985,510.37
  5. Step 5: Solve for x
    x = 59,985,510.37/12,078.61
  6. Step 6: Final answer
    x = 4,966.26

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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.