Home / 20,877.42-28,816.90-11,929.88

Finding the Fourth Proportional to 20,877.42, 28,816.90 and 11,929.88

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Solution

The fourth proportional to 20,877.42, 28,816.90 and 11,929.88 is: 16,466.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.42 : 28,816.90 = 11,929.88 : x
  2. Step 2: Convert to fraction form
    20,877.42/28,816.90 = 11,929.88/x
  3. Step 3: Cross multiply
    20,877.42x = 28,816.90 × 11,929.88
  4. Step 4: Simplify right side
    20,877.42x = 343,782,158.97
  5. Step 5: Solve for x
    x = 343,782,158.97/20,877.42
  6. Step 6: Final answer
    x = 16,466.70

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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.