Home / 20,935.30-28,879.88-12,963.68

Finding the Fourth Proportional to 20,935.30, 28,879.88 and 12,963.68

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Solution

The fourth proportional to 20,935.30, 28,879.88 and 12,963.68 is: 17,883.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.30 : 28,879.88 = 12,963.68 : x
  2. Step 2: Convert to fraction form
    20,935.30/28,879.88 = 12,963.68/x
  3. Step 3: Cross multiply
    20,935.30x = 28,879.88 × 12,963.68
  4. Step 4: Simplify right side
    20,935.30x = 374,389,598.37
  5. Step 5: Solve for x
    x = 374,389,598.37/20,935.30
  6. Step 6: Final answer
    x = 17,883.18

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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.