Home / 20,875.88-28,791.92-18,352.60

Finding the Fourth Proportional to 20,875.88, 28,791.92 and 18,352.60

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Solution

The fourth proportional to 20,875.88, 28,791.92 and 18,352.60 is: 25,311.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.88 : 28,791.92 = 18,352.60 : x
  2. Step 2: Convert to fraction form
    20,875.88/28,791.92 = 18,352.60/x
  3. Step 3: Cross multiply
    20,875.88x = 28,791.92 × 18,352.60
  4. Step 4: Simplify right side
    20,875.88x = 528,406,564.89
  5. Step 5: Solve for x
    x = 528,406,564.89/20,875.88
  6. Step 6: Final answer
    x = 25,311.82

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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.