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Finding the Fourth Proportional to 28,703.38, 39,615.42 and 16,766.68

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Solution

The fourth proportional to 28,703.38, 39,615.42 and 16,766.68 is: 23,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,703.38 : 39,615.42 = 16,766.68 : x
  2. Step 2: Convert to fraction form
    28,703.38/39,615.42 = 16,766.68/x
  3. Step 3: Cross multiply
    28,703.38x = 39,615.42 × 16,766.68
  4. Step 4: Simplify right side
    28,703.38x = 664,219,070.21
  5. Step 5: Solve for x
    x = 664,219,070.21/28,703.38
  6. Step 6: Final answer
    x = 23,140.80

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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.