Home / 20,829.96-28,744.63-11,880.35

Finding the Fourth Proportional to 20,829.96, 28,744.63 and 11,880.35

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Solution

The fourth proportional to 20,829.96, 28,744.63 and 11,880.35 is: 16,394.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.96 : 28,744.63 = 11,880.35 : x
  2. Step 2: Convert to fraction form
    20,829.96/28,744.63 = 11,880.35/x
  3. Step 3: Cross multiply
    20,829.96x = 28,744.63 × 11,880.35
  4. Step 4: Simplify right side
    20,829.96x = 341,496,151.96
  5. Step 5: Solve for x
    x = 341,496,151.96/20,829.96
  6. Step 6: Final answer
    x = 16,394.47

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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.