Home / 20,692.20-28,555.04-11,260.74

Finding the Fourth Proportional to 20,692.20, 28,555.04 and 11,260.74

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Solution

The fourth proportional to 20,692.20, 28,555.04 and 11,260.74 is: 15,539.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.20 : 28,555.04 = 11,260.74 : x
  2. Step 2: Convert to fraction form
    20,692.20/28,555.04 = 11,260.74/x
  3. Step 3: Cross multiply
    20,692.20x = 28,555.04 × 11,260.74
  4. Step 4: Simplify right side
    20,692.20x = 321,550,881.13
  5. Step 5: Solve for x
    x = 321,550,881.13/20,692.20
  6. Step 6: Final answer
    x = 15,539.71

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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.