Home / 18,818.78-28,226.34-11,421.27

Finding the Fourth Proportional to 18,818.78, 28,226.34 and 11,421.27

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Solution

The fourth proportional to 18,818.78, 28,226.34 and 11,421.27 is: 17,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,818.78 : 28,226.34 = 11,421.27 : x
  2. Step 2: Convert to fraction form
    18,818.78/28,226.34 = 11,421.27/x
  3. Step 3: Cross multiply
    18,818.78x = 28,226.34 × 11,421.27
  4. Step 4: Simplify right side
    18,818.78x = 322,380,650.25
  5. Step 5: Solve for x
    x = 322,380,650.25/18,818.78
  6. Step 6: Final answer
    x = 17,130.80

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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.