Home / 20,891.29-28,828.38-11,459.83

Finding the Fourth Proportional to 20,891.29, 28,828.38 and 11,459.83

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Solution

The fourth proportional to 20,891.29, 28,828.38 and 11,459.83 is: 15,813.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.29 : 28,828.38 = 11,459.83 : x
  2. Step 2: Convert to fraction form
    20,891.29/28,828.38 = 11,459.83/x
  3. Step 3: Cross multiply
    20,891.29x = 28,828.38 × 11,459.83
  4. Step 4: Simplify right side
    20,891.29x = 330,368,333.98
  5. Step 5: Solve for x
    x = 330,368,333.98/20,891.29
  6. Step 6: Final answer
    x = 15,813.69

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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.