Home / 28,218.84-38,939.90-15,469.98

Finding the Fourth Proportional to 28,218.84, 38,939.90 and 15,469.98

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Solution

The fourth proportional to 28,218.84, 38,939.90 and 15,469.98 is: 21,347.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.84 : 38,939.90 = 15,469.98 : x
  2. Step 2: Convert to fraction form
    28,218.84/38,939.90 = 15,469.98/x
  3. Step 3: Cross multiply
    28,218.84x = 38,939.90 × 15,469.98
  4. Step 4: Simplify right side
    28,218.84x = 602,399,474.20
  5. Step 5: Solve for x
    x = 602,399,474.20/28,218.84
  6. Step 6: Final answer
    x = 21,347.42

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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.