Home / 8,210.45-12,319.78-3,281.50

Finding the Fourth Proportional to 8,210.45, 12,319.78 and 3,281.50

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Solution

The fourth proportional to 8,210.45, 12,319.78 and 3,281.50 is: 4,923.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,210.45 : 12,319.78 = 3,281.50 : x
  2. Step 2: Convert to fraction form
    8,210.45/12,319.78 = 3,281.50/x
  3. Step 3: Cross multiply
    8,210.45x = 12,319.78 × 3,281.50
  4. Step 4: Simplify right side
    8,210.45x = 40,427,358.07
  5. Step 5: Solve for x
    x = 40,427,358.07/8,210.45
  6. Step 6: Final answer
    x = 4,923.89

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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.