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Finding the Fourth Proportional to 42,561.76, 63,813.02 and 18,856.44

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Solution

The fourth proportional to 42,561.76, 63,813.02 and 18,856.44 is: 28,271.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,561.76 : 63,813.02 = 18,856.44 : x
  2. Step 2: Convert to fraction form
    42,561.76/63,813.02 = 18,856.44/x
  3. Step 3: Cross multiply
    42,561.76x = 63,813.02 × 18,856.44
  4. Step 4: Simplify right side
    42,561.76x = 1,203,286,382.85
  5. Step 5: Solve for x
    x = 1,203,286,382.85/42,561.76
  6. Step 6: Final answer
    x = 28,271.54

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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.