Home / 20,434.56-28,198.92-12,490.08

Finding the Fourth Proportional to 20,434.56, 28,198.92 and 12,490.08

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Solution

The fourth proportional to 20,434.56, 28,198.92 and 12,490.08 is: 17,235.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.56 : 28,198.92 = 12,490.08 : x
  2. Step 2: Convert to fraction form
    20,434.56/28,198.92 = 12,490.08/x
  3. Step 3: Cross multiply
    20,434.56x = 28,198.92 × 12,490.08
  4. Step 4: Simplify right side
    20,434.56x = 352,206,766.71
  5. Step 5: Solve for x
    x = 352,206,766.71/20,434.56
  6. Step 6: Final answer
    x = 17,235.84

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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.