Home / 13,578.08-18,731.68-8,263.68

Finding the Fourth Proportional to 13,578.08, 18,731.68 and 8,263.68

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Solution

The fourth proportional to 13,578.08, 18,731.68 and 8,263.68 is: 11,400.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.08 : 18,731.68 = 8,263.68 : x
  2. Step 2: Convert to fraction form
    13,578.08/18,731.68 = 8,263.68/x
  3. Step 3: Cross multiply
    13,578.08x = 18,731.68 × 8,263.68
  4. Step 4: Simplify right side
    13,578.08x = 154,792,609.38
  5. Step 5: Solve for x
    x = 154,792,609.38/13,578.08
  6. Step 6: Final answer
    x = 11,400.18

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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.