Home / 20,433.21-28,189.67-12,877.53

Finding the Fourth Proportional to 20,433.21, 28,189.67 and 12,877.53

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Solution

The fourth proportional to 20,433.21, 28,189.67 and 12,877.53 is: 17,765.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,433.21 : 28,189.67 = 12,877.53 : x
  2. Step 2: Convert to fraction form
    20,433.21/28,189.67 = 12,877.53/x
  3. Step 3: Cross multiply
    20,433.21x = 28,189.67 × 12,877.53
  4. Step 4: Simplify right side
    20,433.21x = 363,013,256.73
  5. Step 5: Solve for x
    x = 363,013,256.73/20,433.21
  6. Step 6: Final answer
    x = 17,765.85

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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.