Home / 19,961.60-29,942.40-13,740.80

Finding the Fourth Proportional to 19,961.60, 29,942.40 and 13,740.80

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Solution

The fourth proportional to 19,961.60, 29,942.40 and 13,740.80 is: 20,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,961.60 : 29,942.40 = 13,740.80 : x
  2. Step 2: Convert to fraction form
    19,961.60/29,942.40 = 13,740.80/x
  3. Step 3: Cross multiply
    19,961.60x = 29,942.40 × 13,740.80
  4. Step 4: Simplify right side
    19,961.60x = 411,432,529.92
  5. Step 5: Solve for x
    x = 411,432,529.92/19,961.60
  6. Step 6: Final answer
    x = 20,611.20

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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.