Home / 13,620.76-18,789.98-8,306.35

Finding the Fourth Proportional to 13,620.76, 18,789.98 and 8,306.35

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Solution

The fourth proportional to 13,620.76, 18,789.98 and 8,306.35 is: 11,458.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.76 : 18,789.98 = 8,306.35 : x
  2. Step 2: Convert to fraction form
    13,620.76/18,789.98 = 8,306.35/x
  3. Step 3: Cross multiply
    13,620.76x = 18,789.98 × 8,306.35
  4. Step 4: Simplify right side
    13,620.76x = 156,076,061.87
  5. Step 5: Solve for x
    x = 156,076,061.87/13,620.76
  6. Step 6: Final answer
    x = 11,458.69

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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.