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Finding the Fourth Proportional to 18,802.21, 28,203.62 and 8,939.50

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Solution

The fourth proportional to 18,802.21, 28,203.62 and 8,939.50 is: 13,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.21 : 28,203.62 = 8,939.50 : x
  2. Step 2: Convert to fraction form
    18,802.21/28,203.62 = 8,939.50/x
  3. Step 3: Cross multiply
    18,802.21x = 28,203.62 × 8,939.50
  4. Step 4: Simplify right side
    18,802.21x = 252,126,260.99
  5. Step 5: Solve for x
    x = 252,126,260.99/18,802.21
  6. Step 6: Final answer
    x = 13,409.40

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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.