Home / 8,657.18-12,986.98-3,109.49

Finding the Fourth Proportional to 8,657.18, 12,986.98 and 3,109.49

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Solution

The fourth proportional to 8,657.18, 12,986.98 and 3,109.49 is: 4,664.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.18 : 12,986.98 = 3,109.49 : x
  2. Step 2: Convert to fraction form
    8,657.18/12,986.98 = 3,109.49/x
  3. Step 3: Cross multiply
    8,657.18x = 12,986.98 × 3,109.49
  4. Step 4: Simplify right side
    8,657.18x = 40,382,877.92
  5. Step 5: Solve for x
    x = 40,382,877.92/8,657.18
  6. Step 6: Final answer
    x = 4,664.67

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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.