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Finding the Fourth Proportional to 28,206.99, 38,913.12 and 18,133.56

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Solution

The fourth proportional to 28,206.99, 38,913.12 and 18,133.56 is: 25,016.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,206.99 : 38,913.12 = 18,133.56 : x
  2. Step 2: Convert to fraction form
    28,206.99/38,913.12 = 18,133.56/x
  3. Step 3: Cross multiply
    28,206.99x = 38,913.12 × 18,133.56
  4. Step 4: Simplify right side
    28,206.99x = 705,633,396.31
  5. Step 5: Solve for x
    x = 705,633,396.31/28,206.99
  6. Step 6: Final answer
    x = 25,016.26

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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.