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Finding the Fourth Proportional to 20,903.77, 28,842.09 and 11,829.28

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Solution

The fourth proportional to 20,903.77, 28,842.09 and 11,829.28 is: 16,321.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.77 : 28,842.09 = 11,829.28 : x
  2. Step 2: Convert to fraction form
    20,903.77/28,842.09 = 11,829.28/x
  3. Step 3: Cross multiply
    20,903.77x = 28,842.09 × 11,829.28
  4. Step 4: Simplify right side
    20,903.77x = 341,181,158.40
  5. Step 5: Solve for x
    x = 341,181,158.40/20,903.77
  6. Step 6: Final answer
    x = 16,321.51

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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.