Home / 20,855.07-28,782.68-11,900.52

Finding the Fourth Proportional to 20,855.07, 28,782.68 and 11,900.52

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Solution

The fourth proportional to 20,855.07, 28,782.68 and 11,900.52 is: 16,424.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.07 : 28,782.68 = 11,900.52 : x
  2. Step 2: Convert to fraction form
    20,855.07/28,782.68 = 11,900.52/x
  3. Step 3: Cross multiply
    20,855.07x = 28,782.68 × 11,900.52
  4. Step 4: Simplify right side
    20,855.07x = 342,528,799.49
  5. Step 5: Solve for x
    x = 342,528,799.49/20,855.07
  6. Step 6: Final answer
    x = 16,424.25

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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.