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Finding the Fourth Proportional to 20,805.66, 28,701.79 and 20,000.00

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Solution

The fourth proportional to 20,805.66, 28,701.79 and 20,000.00 is: 27,590.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.66 : 28,701.79 = 20,000.00 : x
  2. Step 2: Convert to fraction form
    20,805.66/28,701.79 = 20,000.00/x
  3. Step 3: Cross multiply
    20,805.66x = 28,701.79 × 20,000.00
  4. Step 4: Simplify right side
    20,805.66x = 574,035,821.75
  5. Step 5: Solve for x
    x = 574,035,821.75/20,805.66
  6. Step 6: Final answer
    x = 27,590.37

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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.