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Finding the Fourth Proportional to 42,169.80, 63,246.60 and 12,588.60

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Solution

The fourth proportional to 42,169.80, 63,246.60 and 12,588.60 is: 18,880.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,169.80 : 63,246.60 = 12,588.60 : x
  2. Step 2: Convert to fraction form
    42,169.80/63,246.60 = 12,588.60/x
  3. Step 3: Cross multiply
    42,169.80x = 63,246.60 × 12,588.60
  4. Step 4: Simplify right side
    42,169.80x = 796,186,148.76
  5. Step 5: Solve for x
    x = 796,186,148.76/42,169.80
  6. Step 6: Final answer
    x = 18,880.48

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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.