Home / 13,420.56-18,522.08-8,115.41

Finding the Fourth Proportional to 13,420.56, 18,522.08 and 8,115.41

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Solution

The fourth proportional to 13,420.56, 18,522.08 and 8,115.41 is: 11,200.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420.56 : 18,522.08 = 8,115.41 : x
  2. Step 2: Convert to fraction form
    13,420.56/18,522.08 = 8,115.41/x
  3. Step 3: Cross multiply
    13,420.56x = 18,522.08 × 8,115.41
  4. Step 4: Simplify right side
    13,420.56x = 150,314,232.68
  5. Step 5: Solve for x
    x = 150,314,232.68/13,420.56
  6. Step 6: Final answer
    x = 11,200.30

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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.