Home / 20,890.32-28,828.49-11,458.82

Finding the Fourth Proportional to 20,890.32, 28,828.49 and 11,458.82

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Solution

The fourth proportional to 20,890.32, 28,828.49 and 11,458.82 is: 15,813.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.32 : 28,828.49 = 11,458.82 : x
  2. Step 2: Convert to fraction form
    20,890.32/28,828.49 = 11,458.82/x
  3. Step 3: Cross multiply
    20,890.32x = 28,828.49 × 11,458.82
  4. Step 4: Simplify right side
    20,890.32x = 330,340,276.35
  5. Step 5: Solve for x
    x = 330,340,276.35/20,890.32
  6. Step 6: Final answer
    x = 15,813.08

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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.