Home / 13,520.64-18,656.22-12,431.91

Finding the Fourth Proportional to 13,520.64, 18,656.22 and 12,431.91

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Solution

The fourth proportional to 13,520.64, 18,656.22 and 12,431.91 is: 17,153.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.64 : 18,656.22 = 12,431.91 : x
  2. Step 2: Convert to fraction form
    13,520.64/18,656.22 = 12,431.91/x
  3. Step 3: Cross multiply
    13,520.64x = 18,656.22 × 12,431.91
  4. Step 4: Simplify right side
    13,520.64x = 231,932,447.98
  5. Step 5: Solve for x
    x = 231,932,447.98/13,520.64
  6. Step 6: Final answer
    x = 17,153.95

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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.