Home / 20,514.40-30,771.60-16,820.80

Finding the Fourth Proportional to 20,514.40, 30,771.60 and 16,820.80

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Solution

The fourth proportional to 20,514.40, 30,771.60 and 16,820.80 is: 25,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,514.40 : 30,771.60 = 16,820.80 : x
  2. Step 2: Convert to fraction form
    20,514.40/30,771.60 = 16,820.80/x
  3. Step 3: Cross multiply
    20,514.40x = 30,771.60 × 16,820.80
  4. Step 4: Simplify right side
    20,514.40x = 517,602,929.28
  5. Step 5: Solve for x
    x = 517,602,929.28/20,514.40
  6. Step 6: Final answer
    x = 25,231.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.