Home / 12,620.34-18,934-11,243.20

Finding the Fourth Proportional to 12,620.34, 18,934 and 11,243.20

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Solution

The fourth proportional to 12,620.34, 18,934 and 11,243.20 is: 16,867.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.34 : 18,934 = 11,243.20 : x
  2. Step 2: Convert to fraction form
    12,620.34/18,934 = 11,243.20/x
  3. Step 3: Cross multiply
    12,620.34x = 18,934 × 11,243.20
  4. Step 4: Simplify right side
    12,620.34x = 212,878,748.80
  5. Step 5: Solve for x
    x = 212,878,748.80/12,620.34
  6. Step 6: Final answer
    x = 16,867.91

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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.