Home / 20,664.27-28,515.77-11,711.58

Finding the Fourth Proportional to 20,664.27, 28,515.77 and 11,711.58

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Solution

The fourth proportional to 20,664.27, 28,515.77 and 11,711.58 is: 16,161.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.27 : 28,515.77 = 11,711.58 : x
  2. Step 2: Convert to fraction form
    20,664.27/28,515.77 = 11,711.58/x
  3. Step 3: Cross multiply
    20,664.27x = 28,515.77 × 11,711.58
  4. Step 4: Simplify right side
    20,664.27x = 333,964,663.06
  5. Step 5: Solve for x
    x = 333,964,663.06/20,664.27
  6. Step 6: Final answer
    x = 16,161.45

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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.