Home / 8,206.40-12,309.60-7,331.60

Finding the Fourth Proportional to 8,206.40, 12,309.60 and 7,331.60

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Solution

The fourth proportional to 8,206.40, 12,309.60 and 7,331.60 is: 10,997.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,206.40 : 12,309.60 = 7,331.60 : x
  2. Step 2: Convert to fraction form
    8,206.40/12,309.60 = 7,331.60/x
  3. Step 3: Cross multiply
    8,206.40x = 12,309.60 × 7,331.60
  4. Step 4: Simplify right side
    8,206.40x = 90,249,063.36
  5. Step 5: Solve for x
    x = 90,249,063.36/8,206.40
  6. Step 6: Final answer
    x = 10,997.40

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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.