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Finding the Fourth Proportional to 20,160.60, 30,237.30 and 12,751.80

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Solution

The fourth proportional to 20,160.60, 30,237.30 and 12,751.80 is: 19,125.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,160.60 : 30,237.30 = 12,751.80 : x
  2. Step 2: Convert to fraction form
    20,160.60/30,237.30 = 12,751.80/x
  3. Step 3: Cross multiply
    20,160.60x = 30,237.30 × 12,751.80
  4. Step 4: Simplify right side
    20,160.60x = 385,580,002.14
  5. Step 5: Solve for x
    x = 385,580,002.14/20,160.60
  6. Step 6: Final answer
    x = 19,125.42

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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.