Home / 12,012.98-18,020.54-4,221.86

Finding the Fourth Proportional to 12,012.98, 18,020.54 and 4,221.86

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Solution

The fourth proportional to 12,012.98, 18,020.54 and 4,221.86 is: 6,333.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,012.98 : 18,020.54 = 4,221.86 : x
  2. Step 2: Convert to fraction form
    12,012.98/18,020.54 = 4,221.86/x
  3. Step 3: Cross multiply
    12,012.98x = 18,020.54 × 4,221.86
  4. Step 4: Simplify right side
    12,012.98x = 76,080,117.46
  5. Step 5: Solve for x
    x = 76,080,117.46/12,012.98
  6. Step 6: Final answer
    x = 6,333.16

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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.