Home / 21,289.80-29,383.40-12,910.44

Finding the Fourth Proportional to 21,289.80, 29,383.40 and 12,910.44

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Solution

The fourth proportional to 21,289.80, 29,383.40 and 12,910.44 is: 17,818.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.80 : 29,383.40 = 12,910.44 : x
  2. Step 2: Convert to fraction form
    21,289.80/29,383.40 = 12,910.44/x
  3. Step 3: Cross multiply
    21,289.80x = 29,383.40 × 12,910.44
  4. Step 4: Simplify right side
    21,289.80x = 379,352,622.70
  5. Step 5: Solve for x
    x = 379,352,622.70/21,289.80
  6. Step 6: Final answer
    x = 17,818.52

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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.