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Finding the Fourth Proportional to 13,995.84, 20,990.72 and 4,133.44

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Solution

The fourth proportional to 13,995.84, 20,990.72 and 4,133.44 is: 6,199.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,995.84 : 20,990.72 = 4,133.44 : x
  2. Step 2: Convert to fraction form
    13,995.84/20,990.72 = 4,133.44/x
  3. Step 3: Cross multiply
    13,995.84x = 20,990.72 × 4,133.44
  4. Step 4: Simplify right side
    13,995.84x = 86,763,881.68
  5. Step 5: Solve for x
    x = 86,763,881.68/13,995.84
  6. Step 6: Final answer
    x = 6,199.26

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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.