Home / 8,243.20-12,364.80-7,219.20

Finding the Fourth Proportional to 8,243.20, 12,364.80 and 7,219.20

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Solution

The fourth proportional to 8,243.20, 12,364.80 and 7,219.20 is: 10,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,243.20 : 12,364.80 = 7,219.20 : x
  2. Step 2: Convert to fraction form
    8,243.20/12,364.80 = 7,219.20/x
  3. Step 3: Cross multiply
    8,243.20x = 12,364.80 × 7,219.20
  4. Step 4: Simplify right side
    8,243.20x = 89,263,964.16
  5. Step 5: Solve for x
    x = 89,263,964.16/8,243.20
  6. Step 6: Final answer
    x = 10,828.80

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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.