Home / 12,011.58-18,012.30-4,218.60

Finding the Fourth Proportional to 12,011.58, 18,012.30 and 4,218.60

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Solution

The fourth proportional to 12,011.58, 18,012.30 and 4,218.60 is: 6,326.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,011.58 : 18,012.30 = 4,218.60 : x
  2. Step 2: Convert to fraction form
    12,011.58/18,012.30 = 4,218.60/x
  3. Step 3: Cross multiply
    12,011.58x = 18,012.30 × 4,218.60
  4. Step 4: Simplify right side
    12,011.58x = 75,986,688.78
  5. Step 5: Solve for x
    x = 75,986,688.78/12,011.58
  6. Step 6: Final answer
    x = 6,326.12

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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.