Home / 18,636.12-25,704.89-12,891.06

Finding the Fourth Proportional to 18,636.12, 25,704.89 and 12,891.06

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Solution

The fourth proportional to 18,636.12, 25,704.89 and 12,891.06 is: 17,780.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.12 : 25,704.89 = 12,891.06 : x
  2. Step 2: Convert to fraction form
    18,636.12/25,704.89 = 12,891.06/x
  3. Step 3: Cross multiply
    18,636.12x = 25,704.89 × 12,891.06
  4. Step 4: Simplify right side
    18,636.12x = 331,363,279.28
  5. Step 5: Solve for x
    x = 331,363,279.28/18,636.12
  6. Step 6: Final answer
    x = 17,780.70

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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.