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Finding the Fourth Proportional to 42,321.47, 63,511.41 and 14,619.47

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Solution

The fourth proportional to 42,321.47, 63,511.41 and 14,619.47 is: 21,939.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,321.47 : 63,511.41 = 14,619.47 : x
  2. Step 2: Convert to fraction form
    42,321.47/63,511.41 = 14,619.47/x
  3. Step 3: Cross multiply
    42,321.47x = 63,511.41 × 14,619.47
  4. Step 4: Simplify right side
    42,321.47x = 928,502,835.60
  5. Step 5: Solve for x
    x = 928,502,835.60/42,321.47
  6. Step 6: Final answer
    x = 21,939.29

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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.