Home / 13,179.28-18,187.52-8,142.34

Finding the Fourth Proportional to 13,179.28, 18,187.52 and 8,142.34

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Solution

The fourth proportional to 13,179.28, 18,187.52 and 8,142.34 is: 11,236.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.28 : 18,187.52 = 8,142.34 : x
  2. Step 2: Convert to fraction form
    13,179.28/18,187.52 = 8,142.34/x
  3. Step 3: Cross multiply
    13,179.28x = 18,187.52 × 8,142.34
  4. Step 4: Simplify right side
    13,179.28x = 148,088,971.60
  5. Step 5: Solve for x
    x = 148,088,971.60/13,179.28
  6. Step 6: Final answer
    x = 11,236.50

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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.