Home / 20,560.20-30,869.10-12,784.20

Finding the Fourth Proportional to 20,560.20, 30,869.10 and 12,784.20

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Solution

The fourth proportional to 20,560.20, 30,869.10 and 12,784.20 is: 19,194.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.20 : 30,869.10 = 12,784.20 : x
  2. Step 2: Convert to fraction form
    20,560.20/30,869.10 = 12,784.20/x
  3. Step 3: Cross multiply
    20,560.20x = 30,869.10 × 12,784.20
  4. Step 4: Simplify right side
    20,560.20x = 394,636,748.22
  5. Step 5: Solve for x
    x = 394,636,748.22/20,560.20
  6. Step 6: Final answer
    x = 19,194.21

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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.