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Finding the Fourth Proportional to 13,668.93, 20,503.38 and 10,553.49

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Solution

The fourth proportional to 13,668.93, 20,503.38 and 10,553.49 is: 15,830.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.93 : 20,503.38 = 10,553.49 : x
  2. Step 2: Convert to fraction form
    13,668.93/20,503.38 = 10,553.49/x
  3. Step 3: Cross multiply
    13,668.93x = 20,503.38 × 10,553.49
  4. Step 4: Simplify right side
    13,668.93x = 216,382,215.80
  5. Step 5: Solve for x
    x = 216,382,215.80/13,668.93
  6. Step 6: Final answer
    x = 15,830.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.