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Finding the Fourth Proportional to 18,668.90, 25,763.82 and 10,711.46

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Solution

The fourth proportional to 18,668.90, 25,763.82 and 10,711.46 is: 14,782.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.90 : 25,763.82 = 10,711.46 : x
  2. Step 2: Convert to fraction form
    18,668.90/25,763.82 = 10,711.46/x
  3. Step 3: Cross multiply
    18,668.90x = 25,763.82 × 10,711.46
  4. Step 4: Simplify right side
    18,668.90x = 275,968,127.38
  5. Step 5: Solve for x
    x = 275,968,127.38/18,668.90
  6. Step 6: Final answer
    x = 14,782.24

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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.