Home / 20,877.20-28,810.78-11,925.90

Finding the Fourth Proportional to 20,877.20, 28,810.78 and 11,925.90

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Solution

The fourth proportional to 20,877.20, 28,810.78 and 11,925.90 is: 16,457.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.20 : 28,810.78 = 11,925.90 : x
  2. Step 2: Convert to fraction form
    20,877.20/28,810.78 = 11,925.90/x
  3. Step 3: Cross multiply
    20,877.20x = 28,810.78 × 11,925.90
  4. Step 4: Simplify right side
    20,877.20x = 343,594,481.20
  5. Step 5: Solve for x
    x = 343,594,481.20/20,877.20
  6. Step 6: Final answer
    x = 16,457.88

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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.