Home / 20,513.18-28,308.21-11,081.74

Finding the Fourth Proportional to 20,513.18, 28,308.21 and 11,081.74

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Solution

The fourth proportional to 20,513.18, 28,308.21 and 11,081.74 is: 15,292.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.18 : 28,308.21 = 11,081.74 : x
  2. Step 2: Convert to fraction form
    20,513.18/28,308.21 = 11,081.74/x
  3. Step 3: Cross multiply
    20,513.18x = 28,308.21 × 11,081.74
  4. Step 4: Simplify right side
    20,513.18x = 313,704,223.09
  5. Step 5: Solve for x
    x = 313,704,223.09/20,513.18
  6. Step 6: Final answer
    x = 15,292.82

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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.