Home / 13,220.58-18,247.16-12,156.67

Finding the Fourth Proportional to 13,220.58, 18,247.16 and 12,156.67

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Solution

The fourth proportional to 13,220.58, 18,247.16 and 12,156.67 is: 16,778.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.58 : 18,247.16 = 12,156.67 : x
  2. Step 2: Convert to fraction form
    13,220.58/18,247.16 = 12,156.67/x
  3. Step 3: Cross multiply
    13,220.58x = 18,247.16 × 12,156.67
  4. Step 4: Simplify right side
    13,220.58x = 221,824,584.74
  5. Step 5: Solve for x
    x = 221,824,584.74/13,220.58
  6. Step 6: Final answer
    x = 16,778.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.