Home / 21,976.65-30,327.85-11,905.08

Finding the Fourth Proportional to 21,976.65, 30,327.85 and 11,905.08

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Solution

The fourth proportional to 21,976.65, 30,327.85 and 11,905.08 is: 16,429.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976.65 : 30,327.85 = 11,905.08 : x
  2. Step 2: Convert to fraction form
    21,976.65/30,327.85 = 11,905.08/x
  3. Step 3: Cross multiply
    21,976.65x = 30,327.85 × 11,905.08
  4. Step 4: Simplify right side
    21,976.65x = 361,055,381.63
  5. Step 5: Solve for x
    x = 361,055,381.63/21,976.65
  6. Step 6: Final answer
    x = 16,429.05

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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.