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Finding the Fourth Proportional to 28,866.79, 39,835.79 and 16,120.19

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Solution

The fourth proportional to 28,866.79, 39,835.79 and 16,120.19 is: 22,245.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,866.79 : 39,835.79 = 16,120.19 : x
  2. Step 2: Convert to fraction form
    28,866.79/39,835.79 = 16,120.19/x
  3. Step 3: Cross multiply
    28,866.79x = 39,835.79 × 16,120.19
  4. Step 4: Simplify right side
    28,866.79x = 642,160,503.60
  5. Step 5: Solve for x
    x = 642,160,503.60/28,866.79
  6. Step 6: Final answer
    x = 22,245.65

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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.