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Finding the Fourth Proportional to 18,668.40, 28,002.60 and 9,898.80

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Solution

The fourth proportional to 18,668.40, 28,002.60 and 9,898.80 is: 14,848.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.40 : 28,002.60 = 9,898.80 : x
  2. Step 2: Convert to fraction form
    18,668.40/28,002.60 = 9,898.80/x
  3. Step 3: Cross multiply
    18,668.40x = 28,002.60 × 9,898.80
  4. Step 4: Simplify right side
    18,668.40x = 277,192,136.88
  5. Step 5: Solve for x
    x = 277,192,136.88/18,668.40
  6. Step 6: Final answer
    x = 14,848.20

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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.