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Finding the Fourth Proportional to 20,280.47, 27,986.99 and 11,327.99

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Solution

The fourth proportional to 20,280.47, 27,986.99 and 11,327.99 is: 15,632.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.47 : 27,986.99 = 11,327.99 : x
  2. Step 2: Convert to fraction form
    20,280.47/27,986.99 = 11,327.99/x
  3. Step 3: Cross multiply
    20,280.47x = 27,986.99 × 11,327.99
  4. Step 4: Simplify right side
    20,280.47x = 317,036,146.28
  5. Step 5: Solve for x
    x = 317,036,146.28/20,280.47
  6. Step 6: Final answer
    x = 15,632.59

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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.