Home / 20,251.68-27,939.85-12,698.31

Finding the Fourth Proportional to 20,251.68, 27,939.85 and 12,698.31

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Solution

The fourth proportional to 20,251.68, 27,939.85 and 12,698.31 is: 17,518.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,251.68 : 27,939.85 = 12,698.31 : x
  2. Step 2: Convert to fraction form
    20,251.68/27,939.85 = 12,698.31/x
  3. Step 3: Cross multiply
    20,251.68x = 27,939.85 × 12,698.31
  4. Step 4: Simplify right side
    20,251.68x = 354,788,876.65
  5. Step 5: Solve for x
    x = 354,788,876.65/20,251.68
  6. Step 6: Final answer
    x = 17,518.98

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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.