Home / 42,611.20-63,868.80-20,435.20

Finding the Fourth Proportional to 42,611.20, 63,868.80 and 20,435.20

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Solution

The fourth proportional to 42,611.20, 63,868.80 and 20,435.20 is: 30,629.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,611.20 : 63,868.80 = 20,435.20 : x
  2. Step 2: Convert to fraction form
    42,611.20/63,868.80 = 20,435.20/x
  3. Step 3: Cross multiply
    42,611.20x = 63,868.80 × 20,435.20
  4. Step 4: Simplify right side
    42,611.20x = 1,305,171,701.76
  5. Step 5: Solve for x
    x = 1,305,171,701.76/42,611.20
  6. Step 6: Final answer
    x = 30,629.78

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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.