Home / 20,511.13-28,305.48-11,558.77

Finding the Fourth Proportional to 20,511.13, 28,305.48 and 11,558.77

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Solution

The fourth proportional to 20,511.13, 28,305.48 and 11,558.77 is: 15,951.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.13 : 28,305.48 = 11,558.77 : x
  2. Step 2: Convert to fraction form
    20,511.13/28,305.48 = 11,558.77/x
  3. Step 3: Cross multiply
    20,511.13x = 28,305.48 × 11,558.77
  4. Step 4: Simplify right side
    20,511.13x = 327,176,533.06
  5. Step 5: Solve for x
    x = 327,176,533.06/20,511.13
  6. Step 6: Final answer
    x = 15,951.17

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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.