Home / 20,513.06-28,308.51-12,020.61

Finding the Fourth Proportional to 20,513.06, 28,308.51 and 12,020.61

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Solution

The fourth proportional to 20,513.06, 28,308.51 and 12,020.61 is: 16,588.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.06 : 28,308.51 = 12,020.61 : x
  2. Step 2: Convert to fraction form
    20,513.06/28,308.51 = 12,020.61/x
  3. Step 3: Cross multiply
    20,513.06x = 28,308.51 × 12,020.61
  4. Step 4: Simplify right side
    20,513.06x = 340,285,558.39
  5. Step 5: Solve for x
    x = 340,285,558.39/20,513.06
  6. Step 6: Final answer
    x = 16,588.73

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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.