Home / 20,910.71-28,847.16-13,353.26

Finding the Fourth Proportional to 20,910.71, 28,847.16 and 13,353.26

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Solution

The fourth proportional to 20,910.71, 28,847.16 and 13,353.26 is: 18,421.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.71 : 28,847.16 = 13,353.26 : x
  2. Step 2: Convert to fraction form
    20,910.71/28,847.16 = 13,353.26/x
  3. Step 3: Cross multiply
    20,910.71x = 28,847.16 × 13,353.26
  4. Step 4: Simplify right side
    20,910.71x = 385,203,560.98
  5. Step 5: Solve for x
    x = 385,203,560.98/20,910.71
  6. Step 6: Final answer
    x = 18,421.35

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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.