Home / 20,952.22-28,913.32-11,520.71

Finding the Fourth Proportional to 20,952.22, 28,913.32 and 11,520.71

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Solution

The fourth proportional to 20,952.22, 28,913.32 and 11,520.71 is: 15,898.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.22 : 28,913.32 = 11,520.71 : x
  2. Step 2: Convert to fraction form
    20,952.22/28,913.32 = 11,520.71/x
  3. Step 3: Cross multiply
    20,952.22x = 28,913.32 × 11,520.71
  4. Step 4: Simplify right side
    20,952.22x = 333,101,974.86
  5. Step 5: Solve for x
    x = 333,101,974.86/20,952.22
  6. Step 6: Final answer
    x = 15,898.17

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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.