Home / 20,586.20-30,908.10-12,810.20

Finding the Fourth Proportional to 20,586.20, 30,908.10 and 12,810.20

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Solution

The fourth proportional to 20,586.20, 30,908.10 and 12,810.20 is: 19,233.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.20 : 30,908.10 = 12,810.20 : x
  2. Step 2: Convert to fraction form
    20,586.20/30,908.10 = 12,810.20/x
  3. Step 3: Cross multiply
    20,586.20x = 30,908.10 × 12,810.20
  4. Step 4: Simplify right side
    20,586.20x = 395,938,942.62
  5. Step 5: Solve for x
    x = 395,938,942.62/20,586.20
  6. Step 6: Final answer
    x = 19,233.22

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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.