Home / 12,321.20-18,481.80-4,528.40

Finding the Fourth Proportional to 12,321.20, 18,481.80 and 4,528.40

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Solution

The fourth proportional to 12,321.20, 18,481.80 and 4,528.40 is: 6,792.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.20 : 18,481.80 = 4,528.40 : x
  2. Step 2: Convert to fraction form
    12,321.20/18,481.80 = 4,528.40/x
  3. Step 3: Cross multiply
    12,321.20x = 18,481.80 × 4,528.40
  4. Step 4: Simplify right side
    12,321.20x = 83,692,983.12
  5. Step 5: Solve for x
    x = 83,692,983.12/12,321.20
  6. Step 6: Final answer
    x = 6,792.60

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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.