Home / 13,138.02-18,133.50-8,662.56

Finding the Fourth Proportional to 13,138.02, 18,133.50 and 8,662.56

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Solution

The fourth proportional to 13,138.02, 18,133.50 and 8,662.56 is: 11,956.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.02 : 18,133.50 = 8,662.56 : x
  2. Step 2: Convert to fraction form
    13,138.02/18,133.50 = 8,662.56/x
  3. Step 3: Cross multiply
    13,138.02x = 18,133.50 × 8,662.56
  4. Step 4: Simplify right side
    13,138.02x = 157,082,531.76
  5. Step 5: Solve for x
    x = 157,082,531.76/13,138.02
  6. Step 6: Final answer
    x = 11,956.33

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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.