Home / 13,405.56-18,500.30-8,372.76

Finding the Fourth Proportional to 13,405.56, 18,500.30 and 8,372.76

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Solution

The fourth proportional to 13,405.56, 18,500.30 and 8,372.76 is: 11,554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.56 : 18,500.30 = 8,372.76 : x
  2. Step 2: Convert to fraction form
    13,405.56/18,500.30 = 8,372.76/x
  3. Step 3: Cross multiply
    13,405.56x = 18,500.30 × 8,372.76
  4. Step 4: Simplify right side
    13,405.56x = 154,898,571.83
  5. Step 5: Solve for x
    x = 154,898,571.83/13,405.56
  6. Step 6: Final answer
    x = 11,554.80

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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.