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Finding the Fourth Proportional to 28,721, 43,079.01 and 9,996.20

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Solution

The fourth proportional to 28,721, 43,079.01 and 9,996.20 is: 14,993.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721 : 43,079.01 = 9,996.20 : x
  2. Step 2: Convert to fraction form
    28,721/43,079.01 = 9,996.20/x
  3. Step 3: Cross multiply
    28,721x = 43,079.01 × 9,996.20
  4. Step 4: Simplify right side
    28,721x = 430,626,399.76
  5. Step 5: Solve for x
    x = 430,626,399.76/28,721
  6. Step 6: Final answer
    x = 14,993.43

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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.