Home / 20,727.28-31,090.69-12,409.62

Finding the Fourth Proportional to 20,727.28, 31,090.69 and 12,409.62

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Solution

The fourth proportional to 20,727.28, 31,090.69 and 12,409.62 is: 18,614.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.28 : 31,090.69 = 12,409.62 : x
  2. Step 2: Convert to fraction form
    20,727.28/31,090.69 = 12,409.62/x
  3. Step 3: Cross multiply
    20,727.28x = 31,090.69 × 12,409.62
  4. Step 4: Simplify right side
    20,727.28x = 385,823,648.44
  5. Step 5: Solve for x
    x = 385,823,648.44/20,727.28
  6. Step 6: Final answer
    x = 18,614.29

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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.