Home / 21,305.12-31,956.96-5,722.64

Finding the Fourth Proportional to 21,305.12, 31,956.96 and 5,722.64

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Solution

The fourth proportional to 21,305.12, 31,956.96 and 5,722.64 is: 8,583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.12 : 31,956.96 = 5,722.64 : x
  2. Step 2: Convert to fraction form
    21,305.12/31,956.96 = 5,722.64/x
  3. Step 3: Cross multiply
    21,305.12x = 31,956.96 × 5,722.64
  4. Step 4: Simplify right side
    21,305.12x = 182,878,177.57
  5. Step 5: Solve for x
    x = 182,878,177.57/21,305.12
  6. Step 6: Final answer
    x = 8,583.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.