Home / 20,829.21-28,744.19-11,269.07

Finding the Fourth Proportional to 20,829.21, 28,744.19 and 11,269.07

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Solution

The fourth proportional to 20,829.21, 28,744.19 and 11,269.07 is: 15,551.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.21 : 28,744.19 = 11,269.07 : x
  2. Step 2: Convert to fraction form
    20,829.21/28,744.19 = 11,269.07/x
  3. Step 3: Cross multiply
    20,829.21x = 28,744.19 × 11,269.07
  4. Step 4: Simplify right side
    20,829.21x = 323,920,289.20
  5. Step 5: Solve for x
    x = 323,920,289.20/20,829.21
  6. Step 6: Final answer
    x = 15,551.25

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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.