Home / 20,903.21-28,845.28-11,471.03

Finding the Fourth Proportional to 20,903.21, 28,845.28 and 11,471.03

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Solution

The fourth proportional to 20,903.21, 28,845.28 and 11,471.03 is: 15,829.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.21 : 28,845.28 = 11,471.03 : x
  2. Step 2: Convert to fraction form
    20,903.21/28,845.28 = 11,471.03/x
  3. Step 3: Cross multiply
    20,903.21x = 28,845.28 × 11,471.03
  4. Step 4: Simplify right side
    20,903.21x = 330,885,072.24
  5. Step 5: Solve for x
    x = 330,885,072.24/20,903.21
  6. Step 6: Final answer
    x = 15,829.39

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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.