Home / 20,470.36-28,249.14-12,087.40

Finding the Fourth Proportional to 20,470.36, 28,249.14 and 12,087.40

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Solution

The fourth proportional to 20,470.36, 28,249.14 and 12,087.40 is: 16,680.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.36 : 28,249.14 = 12,087.40 : x
  2. Step 2: Convert to fraction form
    20,470.36/28,249.14 = 12,087.40/x
  3. Step 3: Cross multiply
    20,470.36x = 28,249.14 × 12,087.40
  4. Step 4: Simplify right side
    20,470.36x = 341,458,654.84
  5. Step 5: Solve for x
    x = 341,458,654.84/20,470.36
  6. Step 6: Final answer
    x = 16,680.64

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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.