Home / 20,764.31-28,655.69-11,692.81

Finding the Fourth Proportional to 20,764.31, 28,655.69 and 11,692.81

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Solution

The fourth proportional to 20,764.31, 28,655.69 and 11,692.81 is: 16,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.31 : 28,655.69 = 11,692.81 : x
  2. Step 2: Convert to fraction form
    20,764.31/28,655.69 = 11,692.81/x
  3. Step 3: Cross multiply
    20,764.31x = 28,655.69 × 11,692.81
  4. Step 4: Simplify right side
    20,764.31x = 335,065,371.20
  5. Step 5: Solve for x
    x = 335,065,371.20/20,764.31
  6. Step 6: Final answer
    x = 16,136.60

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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.