Home / 13,131.73-18,114.77-8,877.20

Finding the Fourth Proportional to 13,131.73, 18,114.77 and 8,877.20

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Solution

The fourth proportional to 13,131.73, 18,114.77 and 8,877.20 is: 12,245.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.73 : 18,114.77 = 8,877.20 : x
  2. Step 2: Convert to fraction form
    13,131.73/18,114.77 = 8,877.20/x
  3. Step 3: Cross multiply
    13,131.73x = 18,114.77 × 8,877.20
  4. Step 4: Simplify right side
    13,131.73x = 160,808,391.86
  5. Step 5: Solve for x
    x = 160,808,391.86/13,131.73
  6. Step 6: Final answer
    x = 12,245.79

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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.