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Finding the Fourth Proportional to 20,000.79, 29,990.91 and 11,697.03

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Solution

The fourth proportional to 20,000.79, 29,990.91 and 11,697.03 is: 17,539.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,000.79 : 29,990.91 = 11,697.03 : x
  2. Step 2: Convert to fraction form
    20,000.79/29,990.91 = 11,697.03/x
  3. Step 3: Cross multiply
    20,000.79x = 29,990.91 × 11,697.03
  4. Step 4: Simplify right side
    20,000.79x = 350,804,574.00
  5. Step 5: Solve for x
    x = 350,804,574.00/20,000.79
  6. Step 6: Final answer
    x = 17,539.54

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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.