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Finding the Fourth Proportional to 28,379.71, 39,165.01 and 17,630.47

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Solution

The fourth proportional to 28,379.71, 39,165.01 and 17,630.47 is: 24,330.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.71 : 39,165.01 = 17,630.47 : x
  2. Step 2: Convert to fraction form
    28,379.71/39,165.01 = 17,630.47/x
  3. Step 3: Cross multiply
    28,379.71x = 39,165.01 × 17,630.47
  4. Step 4: Simplify right side
    28,379.71x = 690,497,533.85
  5. Step 5: Solve for x
    x = 690,497,533.85/28,379.71
  6. Step 6: Final answer
    x = 24,330.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.