Home / 13,685.38-18,879.15-8,647.18

Finding the Fourth Proportional to 13,685.38, 18,879.15 and 8,647.18

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Solution

The fourth proportional to 13,685.38, 18,879.15 and 8,647.18 is: 11,928.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.38 : 18,879.15 = 8,647.18 : x
  2. Step 2: Convert to fraction form
    13,685.38/18,879.15 = 8,647.18/x
  3. Step 3: Cross multiply
    13,685.38x = 18,879.15 × 8,647.18
  4. Step 4: Simplify right side
    13,685.38x = 163,251,408.30
  5. Step 5: Solve for x
    x = 163,251,408.30/13,685.38
  6. Step 6: Final answer
    x = 11,928.89

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Double scale
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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.