Home / 28,760-39,692.64-18,829.76

Finding the Fourth Proportional to 28,760, 39,692.64 and 18,829.76

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Solution

The fourth proportional to 28,760, 39,692.64 and 18,829.76 is: 25,987.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,760 : 39,692.64 = 18,829.76 : x
  2. Step 2: Convert to fraction form
    28,760/39,692.64 = 18,829.76/x
  3. Step 3: Cross multiply
    28,760x = 39,692.64 × 18,829.76
  4. Step 4: Simplify right side
    28,760x = 747,402,884.97
  5. Step 5: Solve for x
    x = 747,402,884.97/28,760
  6. Step 6: Final answer
    x = 25,987.58

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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.