Home / 20,675.25-28,521.86-12,703.64

Finding the Fourth Proportional to 20,675.25, 28,521.86 and 12,703.64

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Solution

The fourth proportional to 20,675.25, 28,521.86 and 12,703.64 is: 17,524.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.25 : 28,521.86 = 12,703.64 : x
  2. Step 2: Convert to fraction form
    20,675.25/28,521.86 = 12,703.64/x
  3. Step 3: Cross multiply
    20,675.25x = 28,521.86 × 12,703.64
  4. Step 4: Simplify right side
    20,675.25x = 362,331,235.44
  5. Step 5: Solve for x
    x = 362,331,235.44/20,675.25
  6. Step 6: Final answer
    x = 17,524.88

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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.