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Finding the Fourth Proportional to 20,677.80, 30,992.40 and 15,477.60

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Solution

The fourth proportional to 20,677.80, 30,992.40 and 15,477.60 is: 23,198.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,677.80 : 30,992.40 = 15,477.60 : x
  2. Step 2: Convert to fraction form
    20,677.80/30,992.40 = 15,477.60/x
  3. Step 3: Cross multiply
    20,677.80x = 30,992.40 × 15,477.60
  4. Step 4: Simplify right side
    20,677.80x = 479,687,970.24
  5. Step 5: Solve for x
    x = 479,687,970.24/20,677.80
  6. Step 6: Final answer
    x = 23,198.21

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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.