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Finding the Fourth Proportional to 20,400.66, 30,602.46 and 8,542.50

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Solution

The fourth proportional to 20,400.66, 30,602.46 and 8,542.50 is: 12,814.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.66 : 30,602.46 = 8,542.50 : x
  2. Step 2: Convert to fraction form
    20,400.66/30,602.46 = 8,542.50/x
  3. Step 3: Cross multiply
    20,400.66x = 30,602.46 × 8,542.50
  4. Step 4: Simplify right side
    20,400.66x = 261,421,514.55
  5. Step 5: Solve for x
    x = 261,421,514.55/20,400.66
  6. Step 6: Final answer
    x = 12,814.37

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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.