Home / 28,691.64-39,583.35-21,155.85

Finding the Fourth Proportional to 28,691.64, 39,583.35 and 21,155.85

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Solution

The fourth proportional to 28,691.64, 39,583.35 and 21,155.85 is: 29,186.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.64 : 39,583.35 = 21,155.85 : x
  2. Step 2: Convert to fraction form
    28,691.64/39,583.35 = 21,155.85/x
  3. Step 3: Cross multiply
    28,691.64x = 39,583.35 × 21,155.85
  4. Step 4: Simplify right side
    28,691.64x = 837,419,415.10
  5. Step 5: Solve for x
    x = 837,419,415.10/28,691.64
  6. Step 6: Final answer
    x = 29,186.88

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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.