Home / 20,485.80-30,725.28-5,692.68

Finding the Fourth Proportional to 20,485.80, 30,725.28 and 5,692.68

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Solution

The fourth proportional to 20,485.80, 30,725.28 and 5,692.68 is: 8,538.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.80 : 30,725.28 = 5,692.68 : x
  2. Step 2: Convert to fraction form
    20,485.80/30,725.28 = 5,692.68/x
  3. Step 3: Cross multiply
    20,485.80x = 30,725.28 × 5,692.68
  4. Step 4: Simplify right side
    20,485.80x = 174,909,186.95
  5. Step 5: Solve for x
    x = 174,909,186.95/20,485.80
  6. Step 6: Final answer
    x = 8,538.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.