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Finding the Fourth Proportional to 13,995.42, 20,993.13 and 13,140.06

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Solution

The fourth proportional to 13,995.42, 20,993.13 and 13,140.06 is: 19,710.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,995.42 : 20,993.13 = 13,140.06 : x
  2. Step 2: Convert to fraction form
    13,995.42/20,993.13 = 13,140.06/x
  3. Step 3: Cross multiply
    13,995.42x = 20,993.13 × 13,140.06
  4. Step 4: Simplify right side
    13,995.42x = 275,850,987.79
  5. Step 5: Solve for x
    x = 275,850,987.79/13,995.42
  6. Step 6: Final answer
    x = 19,710.09

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Similar ratio
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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.