Home / 20,819.84-31,152.96-12,504.96

Finding the Fourth Proportional to 20,819.84, 31,152.96 and 12,504.96

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Solution

The fourth proportional to 20,819.84, 31,152.96 and 12,504.96 is: 18,711.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.84 : 31,152.96 = 12,504.96 : x
  2. Step 2: Convert to fraction form
    20,819.84/31,152.96 = 12,504.96/x
  3. Step 3: Cross multiply
    20,819.84x = 31,152.96 × 12,504.96
  4. Step 4: Simplify right side
    20,819.84x = 389,566,518.68
  5. Step 5: Solve for x
    x = 389,566,518.68/20,819.84
  6. Step 6: Final answer
    x = 18,711.31

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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.