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Finding the Fourth Proportional to 13,556.46, 20,439.21 and 13,472.22

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Solution

The fourth proportional to 13,556.46, 20,439.21 and 13,472.22 is: 20,312.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,556.46 : 20,439.21 = 13,472.22 : x
  2. Step 2: Convert to fraction form
    13,556.46/20,439.21 = 13,472.22/x
  3. Step 3: Cross multiply
    13,556.46x = 20,439.21 × 13,472.22
  4. Step 4: Simplify right side
    13,556.46x = 275,361,533.75
  5. Step 5: Solve for x
    x = 275,361,533.75/13,556.46
  6. Step 6: Final answer
    x = 20,312.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.