Home / 13,279.73-18,269.21-12,910.77

Finding the Fourth Proportional to 13,279.73, 18,269.21 and 12,910.77

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Solution

The fourth proportional to 13,279.73, 18,269.21 and 12,910.77 is: 17,761.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.73 : 18,269.21 = 12,910.77 : x
  2. Step 2: Convert to fraction form
    13,279.73/18,269.21 = 12,910.77/x
  3. Step 3: Cross multiply
    13,279.73x = 18,269.21 × 12,910.77
  4. Step 4: Simplify right side
    13,279.73x = 235,869,600.67
  5. Step 5: Solve for x
    x = 235,869,600.67/13,279.73
  6. Step 6: Final answer
    x = 17,761.63

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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.