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Finding the Fourth Proportional to 18,668.75, 25,762.88 and 10,285.43

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Solution

The fourth proportional to 18,668.75, 25,762.88 and 10,285.43 is: 14,193.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.75 : 25,762.88 = 10,285.43 : x
  2. Step 2: Convert to fraction form
    18,668.75/25,762.88 = 10,285.43/x
  3. Step 3: Cross multiply
    18,668.75x = 25,762.88 × 10,285.43
  4. Step 4: Simplify right side
    18,668.75x = 264,982,247.41
  5. Step 5: Solve for x
    x = 264,982,247.41/18,668.75
  6. Step 6: Final answer
    x = 14,193.89

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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.