Home / 13,158.88-18,153.78-8,620.27

Finding the Fourth Proportional to 13,158.88, 18,153.78 and 8,620.27

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Solution

The fourth proportional to 13,158.88, 18,153.78 and 8,620.27 is: 11,892.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.88 : 18,153.78 = 8,620.27 : x
  2. Step 2: Convert to fraction form
    13,158.88/18,153.78 = 8,620.27/x
  3. Step 3: Cross multiply
    13,158.88x = 18,153.78 × 8,620.27
  4. Step 4: Simplify right side
    13,158.88x = 156,490,485.12
  5. Step 5: Solve for x
    x = 156,490,485.12/13,158.88
  6. Step 6: Final answer
    x = 11,892.39

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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.