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Finding the Fourth Proportional to 28,777.80, 39,713.22 and 16,202.64

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Solution

The fourth proportional to 28,777.80, 39,713.22 and 16,202.64 is: 22,359.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,777.80 : 39,713.22 = 16,202.64 : x
  2. Step 2: Convert to fraction form
    28,777.80/39,713.22 = 16,202.64/x
  3. Step 3: Cross multiply
    28,777.80x = 39,713.22 × 16,202.64
  4. Step 4: Simplify right side
    28,777.80x = 643,459,006.90
  5. Step 5: Solve for x
    x = 643,459,006.90/28,777.80
  6. Step 6: Final answer
    x = 22,359.56

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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.