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Finding the Fourth Proportional to 13,996.63, 20,995.10 and 5,990.31

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Solution

The fourth proportional to 13,996.63, 20,995.10 and 5,990.31 is: 8,985.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,996.63 : 20,995.10 = 5,990.31 : x
  2. Step 2: Convert to fraction form
    13,996.63/20,995.10 = 5,990.31/x
  3. Step 3: Cross multiply
    13,996.63x = 20,995.10 × 5,990.31
  4. Step 4: Simplify right side
    13,996.63x = 125,767,157.48
  5. Step 5: Solve for x
    x = 125,767,157.48/13,996.63
  6. Step 6: Final answer
    x = 8,985.53

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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.