Home / 20,489.90-28,264.28-12,933.54

Finding the Fourth Proportional to 20,489.90, 28,264.28 and 12,933.54

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Solution

The fourth proportional to 20,489.90, 28,264.28 and 12,933.54 is: 17,840.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.90 : 28,264.28 = 12,933.54 : x
  2. Step 2: Convert to fraction form
    20,489.90/28,264.28 = 12,933.54/x
  3. Step 3: Cross multiply
    20,489.90x = 28,264.28 × 12,933.54
  4. Step 4: Simplify right side
    20,489.90x = 365,557,131.28
  5. Step 5: Solve for x
    x = 365,557,131.28/20,489.90
  6. Step 6: Final answer
    x = 17,840.85

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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.