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Finding the Fourth Proportional to 42,561.12, 63,798.12 and 19,203.96

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Solution

The fourth proportional to 42,561.12, 63,798.12 and 19,203.96 is: 28,786.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,561.12 : 63,798.12 = 19,203.96 : x
  2. Step 2: Convert to fraction form
    42,561.12/63,798.12 = 19,203.96/x
  3. Step 3: Cross multiply
    42,561.12x = 63,798.12 × 19,203.96
  4. Step 4: Simplify right side
    42,561.12x = 1,225,176,544.56
  5. Step 5: Solve for x
    x = 1,225,176,544.56/42,561.12
  6. Step 6: Final answer
    x = 28,786.29

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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.