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Finding the Fourth Proportional to 28,807.49, 39,754.14 and 16,868.42

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Solution

The fourth proportional to 28,807.49, 39,754.14 and 16,868.42 is: 23,278.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,807.49 : 39,754.14 = 16,868.42 : x
  2. Step 2: Convert to fraction form
    28,807.49/39,754.14 = 16,868.42/x
  3. Step 3: Cross multiply
    28,807.49x = 39,754.14 × 16,868.42
  4. Step 4: Simplify right side
    28,807.49x = 670,589,331.49
  5. Step 5: Solve for x
    x = 670,589,331.49/28,807.49
  6. Step 6: Final answer
    x = 23,278.30

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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.