Home / 21,223.15-29,285.62-12,269.30

Finding the Fourth Proportional to 21,223.15, 29,285.62 and 12,269.30

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Solution

The fourth proportional to 21,223.15, 29,285.62 and 12,269.30 is: 16,930.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.15 : 29,285.62 = 12,269.30 : x
  2. Step 2: Convert to fraction form
    21,223.15/29,285.62 = 12,269.30/x
  3. Step 3: Cross multiply
    21,223.15x = 29,285.62 × 12,269.30
  4. Step 4: Simplify right side
    21,223.15x = 359,313,880.36
  5. Step 5: Solve for x
    x = 359,313,880.36/21,223.15
  6. Step 6: Final answer
    x = 16,930.28

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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.