Home / 28,407.62-39,202.79-15,661.31

Finding the Fourth Proportional to 28,407.62, 39,202.79 and 15,661.31

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Solution

The fourth proportional to 28,407.62, 39,202.79 and 15,661.31 is: 21,612.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.62 : 39,202.79 = 15,661.31 : x
  2. Step 2: Convert to fraction form
    28,407.62/39,202.79 = 15,661.31/x
  3. Step 3: Cross multiply
    28,407.62x = 39,202.79 × 15,661.31
  4. Step 4: Simplify right side
    28,407.62x = 613,966,882.99
  5. Step 5: Solve for x
    x = 613,966,882.99/28,407.62
  6. Step 6: Final answer
    x = 21,612.76

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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.