Home / 13,453.20-18,555.30-8,141.40

Finding the Fourth Proportional to 13,453.20, 18,555.30 and 8,141.40

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Solution

The fourth proportional to 13,453.20, 18,555.30 and 8,141.40 is: 11,229.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,453.20 : 18,555.30 = 8,141.40 : x
  2. Step 2: Convert to fraction form
    13,453.20/18,555.30 = 8,141.40/x
  3. Step 3: Cross multiply
    13,453.20x = 18,555.30 × 8,141.40
  4. Step 4: Simplify right side
    13,453.20x = 151,066,119.42
  5. Step 5: Solve for x
    x = 151,066,119.42/13,453.20
  6. Step 6: Final answer
    x = 11,229.01

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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.