Home / 21,684.87-29,921.71-12,612.24

Finding the Fourth Proportional to 21,684.87, 29,921.71 and 12,612.24

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Solution

The fourth proportional to 21,684.87, 29,921.71 and 12,612.24 is: 17,402.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,684.87 : 29,921.71 = 12,612.24 : x
  2. Step 2: Convert to fraction form
    21,684.87/29,921.71 = 12,612.24/x
  3. Step 3: Cross multiply
    21,684.87x = 29,921.71 × 12,612.24
  4. Step 4: Simplify right side
    21,684.87x = 377,379,669.65
  5. Step 5: Solve for x
    x = 377,379,669.65/21,684.87
  6. Step 6: Final answer
    x = 17,402.91

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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.