Home / 20,853.08-28,776.92-11,900.35

Finding the Fourth Proportional to 20,853.08, 28,776.92 and 11,900.35

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Solution

The fourth proportional to 20,853.08, 28,776.92 and 11,900.35 is: 16,422.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.08 : 28,776.92 = 11,900.35 : x
  2. Step 2: Convert to fraction form
    20,853.08/28,776.92 = 11,900.35/x
  3. Step 3: Cross multiply
    20,853.08x = 28,776.92 × 11,900.35
  4. Step 4: Simplify right side
    20,853.08x = 342,455,419.92
  5. Step 5: Solve for x
    x = 342,455,419.92/20,853.08
  6. Step 6: Final answer
    x = 16,422.29

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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.