Home / 20,692.19-28,555.32-11,260.75

Finding the Fourth Proportional to 20,692.19, 28,555.32 and 11,260.75

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Solution

The fourth proportional to 20,692.19, 28,555.32 and 11,260.75 is: 15,539.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.19 : 28,555.32 = 11,260.75 : x
  2. Step 2: Convert to fraction form
    20,692.19/28,555.32 = 11,260.75/x
  3. Step 3: Cross multiply
    20,692.19x = 28,555.32 × 11,260.75
  4. Step 4: Simplify right side
    20,692.19x = 321,554,319.69
  5. Step 5: Solve for x
    x = 321,554,319.69/20,692.19
  6. Step 6: Final answer
    x = 15,539.89

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Half scale
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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.