Home / 20,412.15-28,171.85-12,458.99

Finding the Fourth Proportional to 20,412.15, 28,171.85 and 12,458.99

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Solution

The fourth proportional to 20,412.15, 28,171.85 and 12,458.99 is: 17,195.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.15 : 28,171.85 = 12,458.99 : x
  2. Step 2: Convert to fraction form
    20,412.15/28,171.85 = 12,458.99/x
  3. Step 3: Cross multiply
    20,412.15x = 28,171.85 × 12,458.99
  4. Step 4: Simplify right side
    20,412.15x = 350,992,594.28
  5. Step 5: Solve for x
    x = 350,992,594.28/20,412.15
  6. Step 6: Final answer
    x = 17,195.28

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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.