Home / 21,722.79-29,976.57-12,291.51

Finding the Fourth Proportional to 21,722.79, 29,976.57 and 12,291.51

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Solution

The fourth proportional to 21,722.79, 29,976.57 and 12,291.51 is: 16,961.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.79 : 29,976.57 = 12,291.51 : x
  2. Step 2: Convert to fraction form
    21,722.79/29,976.57 = 12,291.51/x
  3. Step 3: Cross multiply
    21,722.79x = 29,976.57 × 12,291.51
  4. Step 4: Simplify right side
    21,722.79x = 368,457,309.92
  5. Step 5: Solve for x
    x = 368,457,309.92/21,722.79
  6. Step 6: Final answer
    x = 16,961.79

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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.