Home / 13,620.06-18,789.18-8,839.58

Finding the Fourth Proportional to 13,620.06, 18,789.18 and 8,839.58

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Solution

The fourth proportional to 13,620.06, 18,789.18 and 8,839.58 is: 12,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.06 : 18,789.18 = 8,839.58 : x
  2. Step 2: Convert to fraction form
    13,620.06/18,789.18 = 8,839.58/x
  3. Step 3: Cross multiply
    13,620.06x = 18,789.18 × 8,839.58
  4. Step 4: Simplify right side
    13,620.06x = 166,088,459.74
  5. Step 5: Solve for x
    x = 166,088,459.74/13,620.06
  6. Step 6: Final answer
    x = 12,194.40

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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.