Home / 12,220.63-18,331.12-2,986.63

Finding the Fourth Proportional to 12,220.63, 18,331.12 and 2,986.63

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Solution

The fourth proportional to 12,220.63, 18,331.12 and 2,986.63 is: 4,479.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.63 : 18,331.12 = 2,986.63 : x
  2. Step 2: Convert to fraction form
    12,220.63/18,331.12 = 2,986.63/x
  3. Step 3: Cross multiply
    12,220.63x = 18,331.12 × 2,986.63
  4. Step 4: Simplify right side
    12,220.63x = 54,748,272.93
  5. Step 5: Solve for x
    x = 54,748,272.93/12,220.63
  6. Step 6: Final answer
    x = 4,479.99

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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.