Home / 20,611.28-30,847.80-16,913.36

Finding the Fourth Proportional to 20,611.28, 30,847.80 and 16,913.36

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Solution

The fourth proportional to 20,611.28, 30,847.80 and 16,913.36 is: 25,313.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.28 : 30,847.80 = 16,913.36 : x
  2. Step 2: Convert to fraction form
    20,611.28/30,847.80 = 16,913.36/x
  3. Step 3: Cross multiply
    20,611.28x = 30,847.80 × 16,913.36
  4. Step 4: Simplify right side
    20,611.28x = 521,739,946.61
  5. Step 5: Solve for x
    x = 521,739,946.61/20,611.28
  6. Step 6: Final answer
    x = 25,313.32

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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.