Home / 18,135.98-27,212.35-8,278.28

Finding the Fourth Proportional to 18,135.98, 27,212.35 and 8,278.28

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Solution

The fourth proportional to 18,135.98, 27,212.35 and 8,278.28 is: 12,421.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,135.98 : 27,212.35 = 8,278.28 : x
  2. Step 2: Convert to fraction form
    18,135.98/27,212.35 = 8,278.28/x
  3. Step 3: Cross multiply
    18,135.98x = 27,212.35 × 8,278.28
  4. Step 4: Simplify right side
    18,135.98x = 225,271,500.09
  5. Step 5: Solve for x
    x = 225,271,500.09/18,135.98
  6. Step 6: Final answer
    x = 12,421.25

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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.