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Finding the Fourth Proportional to 20,282.81, 27,987.80 and 11,330.01

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Solution

The fourth proportional to 20,282.81, 27,987.80 and 11,330.01 is: 15,634.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,282.81 : 27,987.80 = 11,330.01 : x
  2. Step 2: Convert to fraction form
    20,282.81/27,987.80 = 11,330.01/x
  3. Step 3: Cross multiply
    20,282.81x = 27,987.80 × 11,330.01
  4. Step 4: Simplify right side
    20,282.81x = 317,101,997.23
  5. Step 5: Solve for x
    x = 317,101,997.23/20,282.81
  6. Step 6: Final answer
    x = 15,634.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.