Home / 8,309.12-12,477.78-5,553.50

Finding the Fourth Proportional to 8,309.12, 12,477.78 and 5,553.50

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Solution

The fourth proportional to 8,309.12, 12,477.78 and 5,553.50 is: 8,339.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,309.12 : 12,477.78 = 5,553.50 : x
  2. Step 2: Convert to fraction form
    8,309.12/12,477.78 = 5,553.50/x
  3. Step 3: Cross multiply
    8,309.12x = 12,477.78 × 5,553.50
  4. Step 4: Simplify right side
    8,309.12x = 69,295,288.84
  5. Step 5: Solve for x
    x = 69,295,288.84/8,309.12
  6. Step 6: Final answer
    x = 8,339.67

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Half scale
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Similar ratio
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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.