Home / 28,191.62-38,905.72-15,616.38

Finding the Fourth Proportional to 28,191.62, 38,905.72 and 15,616.38

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Solution

The fourth proportional to 28,191.62, 38,905.72 and 15,616.38 is: 21,551.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,191.62 : 38,905.72 = 15,616.38 : x
  2. Step 2: Convert to fraction form
    28,191.62/38,905.72 = 15,616.38/x
  3. Step 3: Cross multiply
    28,191.62x = 38,905.72 × 15,616.38
  4. Step 4: Simplify right side
    28,191.62x = 607,566,507.69
  5. Step 5: Solve for x
    x = 607,566,507.69/28,191.62
  6. Step 6: Final answer
    x = 21,551.32

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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.