Home / 20,758.20-28,616.64-12,795.12

Finding the Fourth Proportional to 20,758.20, 28,616.64 and 12,795.12

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Solution

The fourth proportional to 20,758.20, 28,616.64 and 12,795.12 is: 17,638.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.20 : 28,616.64 = 12,795.12 : x
  2. Step 2: Convert to fraction form
    20,758.20/28,616.64 = 12,795.12/x
  3. Step 3: Cross multiply
    20,758.20x = 28,616.64 × 12,795.12
  4. Step 4: Simplify right side
    20,758.20x = 366,153,342.80
  5. Step 5: Solve for x
    x = 366,153,342.80/20,758.20
  6. Step 6: Final answer
    x = 17,638.97

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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.