Home / 13,129.20-19,673.16-8,191.44

Finding the Fourth Proportional to 13,129.20, 19,673.16 and 8,191.44

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Solution

The fourth proportional to 13,129.20, 19,673.16 and 8,191.44 is: 12,274.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.20 : 19,673.16 = 8,191.44 : x
  2. Step 2: Convert to fraction form
    13,129.20/19,673.16 = 8,191.44/x
  3. Step 3: Cross multiply
    13,129.20x = 19,673.16 × 8,191.44
  4. Step 4: Simplify right side
    13,129.20x = 161,151,509.75
  5. Step 5: Solve for x
    x = 161,151,509.75/13,129.20
  6. Step 6: Final answer
    x = 12,274.28

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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.