Home / 13,636.05-18,817.41-8,920.23

Finding the Fourth Proportional to 13,636.05, 18,817.41 and 8,920.23

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Solution

The fourth proportional to 13,636.05, 18,817.41 and 8,920.23 is: 12,309.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,636.05 : 18,817.41 = 8,920.23 : x
  2. Step 2: Convert to fraction form
    13,636.05/18,817.41 = 8,920.23/x
  3. Step 3: Cross multiply
    13,636.05x = 18,817.41 × 8,920.23
  4. Step 4: Simplify right side
    13,636.05x = 167,855,625.20
  5. Step 5: Solve for x
    x = 167,855,625.20/13,636.05
  6. Step 6: Final answer
    x = 12,309.70

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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.