Home / 20,289.42-27,997.34-13,921.50

Finding the Fourth Proportional to 20,289.42, 27,997.34 and 13,921.50

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Solution

The fourth proportional to 20,289.42, 27,997.34 and 13,921.50 is: 19,210.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.42 : 27,997.34 = 13,921.50 : x
  2. Step 2: Convert to fraction form
    20,289.42/27,997.34 = 13,921.50/x
  3. Step 3: Cross multiply
    20,289.42x = 27,997.34 × 13,921.50
  4. Step 4: Simplify right side
    20,289.42x = 389,764,968.81
  5. Step 5: Solve for x
    x = 389,764,968.81/20,289.42
  6. Step 6: Final answer
    x = 19,210.26

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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.