Home / 20,965.29-28,932.08-11,533.78

Finding the Fourth Proportional to 20,965.29, 28,932.08 and 11,533.78

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Solution

The fourth proportional to 20,965.29, 28,932.08 and 11,533.78 is: 15,916.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.29 : 28,932.08 = 11,533.78 : x
  2. Step 2: Convert to fraction form
    20,965.29/28,932.08 = 11,533.78/x
  3. Step 3: Cross multiply
    20,965.29x = 28,932.08 × 11,533.78
  4. Step 4: Simplify right side
    20,965.29x = 333,696,245.66
  5. Step 5: Solve for x
    x = 333,696,245.66/20,965.29
  6. Step 6: Final answer
    x = 15,916.61

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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.