Home / 20,704.20-31,056.30-15,783.45

Finding the Fourth Proportional to 20,704.20, 31,056.30 and 15,783.45

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Solution

The fourth proportional to 20,704.20, 31,056.30 and 15,783.45 is: 23,675.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.20 : 31,056.30 = 15,783.45 : x
  2. Step 2: Convert to fraction form
    20,704.20/31,056.30 = 15,783.45/x
  3. Step 3: Cross multiply
    20,704.20x = 31,056.30 × 15,783.45
  4. Step 4: Simplify right side
    20,704.20x = 490,175,558.24
  5. Step 5: Solve for x
    x = 490,175,558.24/20,704.20
  6. Step 6: Final answer
    x = 23,675.18

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Similar ratio
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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.