Home / 12,219.60-18,271.80-9,109.20

Finding the Fourth Proportional to 12,219.60, 18,271.80 and 9,109.20

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Solution

The fourth proportional to 12,219.60, 18,271.80 and 9,109.20 is: 13,620.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.60 : 18,271.80 = 9,109.20 : x
  2. Step 2: Convert to fraction form
    12,219.60/18,271.80 = 9,109.20/x
  3. Step 3: Cross multiply
    12,219.60x = 18,271.80 × 9,109.20
  4. Step 4: Simplify right side
    12,219.60x = 166,441,480.56
  5. Step 5: Solve for x
    x = 166,441,480.56/12,219.60
  6. Step 6: Final answer
    x = 13,620.86

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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.