Home / 20,857.92-28,782.72-11,424.84

Finding the Fourth Proportional to 20,857.92, 28,782.72 and 11,424.84

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Solution

The fourth proportional to 20,857.92, 28,782.72 and 11,424.84 is: 15,765.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.92 : 28,782.72 = 11,424.84 : x
  2. Step 2: Convert to fraction form
    20,857.92/28,782.72 = 11,424.84/x
  3. Step 3: Cross multiply
    20,857.92x = 28,782.72 × 11,424.84
  4. Step 4: Simplify right side
    20,857.92x = 328,837,970.76
  5. Step 5: Solve for x
    x = 328,837,970.76/20,857.92
  6. Step 6: Final answer
    x = 15,765.62

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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.