Home / 20,271.68-27,972.96-11,318.48

Finding the Fourth Proportional to 20,271.68, 27,972.96 and 11,318.48

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Solution

The fourth proportional to 20,271.68, 27,972.96 and 11,318.48 is: 15,618.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,271.68 : 27,972.96 = 11,318.48 : x
  2. Step 2: Convert to fraction form
    20,271.68/27,972.96 = 11,318.48/x
  3. Step 3: Cross multiply
    20,271.68x = 27,972.96 × 11,318.48
  4. Step 4: Simplify right side
    20,271.68x = 316,611,388.30
  5. Step 5: Solve for x
    x = 316,611,388.30/20,271.68
  6. Step 6: Final answer
    x = 15,618.41

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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.