Home / 20,298.72-28,004-13,222.56

Finding the Fourth Proportional to 20,298.72, 28,004 and 13,222.56

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Solution

The fourth proportional to 20,298.72, 28,004 and 13,222.56 is: 18,241.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,298.72 : 28,004 = 13,222.56 : x
  2. Step 2: Convert to fraction form
    20,298.72/28,004 = 13,222.56/x
  3. Step 3: Cross multiply
    20,298.72x = 28,004 × 13,222.56
  4. Step 4: Simplify right side
    20,298.72x = 370,284,570.24
  5. Step 5: Solve for x
    x = 370,284,570.24/20,298.72
  6. Step 6: Final answer
    x = 18,241.77

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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.