Home / 20,579.96-28,400.30-11,148.60

Finding the Fourth Proportional to 20,579.96, 28,400.30 and 11,148.60

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Solution

The fourth proportional to 20,579.96, 28,400.30 and 11,148.60 is: 15,385.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.96 : 28,400.30 = 11,148.60 : x
  2. Step 2: Convert to fraction form
    20,579.96/28,400.30 = 11,148.60/x
  3. Step 3: Cross multiply
    20,579.96x = 28,400.30 × 11,148.60
  4. Step 4: Simplify right side
    20,579.96x = 316,623,584.58
  5. Step 5: Solve for x
    x = 316,623,584.58/20,579.96
  6. Step 6: Final answer
    x = 15,385.04

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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.