Home / 20,051.20-27,683.36-13,688.48

Finding the Fourth Proportional to 20,051.20, 27,683.36 and 13,688.48

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Solution

The fourth proportional to 20,051.20, 27,683.36 and 13,688.48 is: 18,898.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,051.20 : 27,683.36 = 13,688.48 : x
  2. Step 2: Convert to fraction form
    20,051.20/27,683.36 = 13,688.48/x
  3. Step 3: Cross multiply
    20,051.20x = 27,683.36 × 13,688.48
  4. Step 4: Simplify right side
    20,051.20x = 378,943,119.69
  5. Step 5: Solve for x
    x = 378,943,119.69/20,051.20
  6. Step 6: Final answer
    x = 18,898.78

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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.