Home / 13,636.18-18,817.60-8,920.36

Finding the Fourth Proportional to 13,636.18, 18,817.60 and 8,920.36

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Solution

The fourth proportional to 13,636.18, 18,817.60 and 8,920.36 is: 12,309.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,636.18 : 18,817.60 = 8,920.36 : x
  2. Step 2: Convert to fraction form
    13,636.18/18,817.60 = 8,920.36/x
  3. Step 3: Cross multiply
    13,636.18x = 18,817.60 × 8,920.36
  4. Step 4: Simplify right side
    13,636.18x = 167,859,627.65
  5. Step 5: Solve for x
    x = 167,859,627.65/13,636.18
  6. Step 6: Final answer
    x = 12,309.88

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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.