Home / 20,880.96-28,811.36-13,322.48

Finding the Fourth Proportional to 20,880.96, 28,811.36 and 13,322.48

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Solution

The fourth proportional to 20,880.96, 28,811.36 and 13,322.48 is: 18,382.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.96 : 28,811.36 = 13,322.48 : x
  2. Step 2: Convert to fraction form
    20,880.96/28,811.36 = 13,322.48/x
  3. Step 3: Cross multiply
    20,880.96x = 28,811.36 × 13,322.48
  4. Step 4: Simplify right side
    20,880.96x = 383,838,656.62
  5. Step 5: Solve for x
    x = 383,838,656.62/20,880.96
  6. Step 6: Final answer
    x = 18,382.24

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Similar ratio
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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.