Home / 15,806.49-21,813.05-8,636.55

Finding the Fourth Proportional to 15,806.49, 21,813.05 and 8,636.55

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Solution

The fourth proportional to 15,806.49, 21,813.05 and 8,636.55 is: 11,918.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,806.49 : 21,813.05 = 8,636.55 : x
  2. Step 2: Convert to fraction form
    15,806.49/21,813.05 = 8,636.55/x
  3. Step 3: Cross multiply
    15,806.49x = 21,813.05 × 8,636.55
  4. Step 4: Simplify right side
    15,806.49x = 188,389,453.79
  5. Step 5: Solve for x
    x = 188,389,453.79/15,806.49
  6. Step 6: Final answer
    x = 11,918.49

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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.