Home / 21,873.24-30,178.62-12,921.48

Finding the Fourth Proportional to 21,873.24, 30,178.62 and 12,921.48

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Solution

The fourth proportional to 21,873.24, 30,178.62 and 12,921.48 is: 17,827.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873.24 : 30,178.62 = 12,921.48 : x
  2. Step 2: Convert to fraction form
    21,873.24/30,178.62 = 12,921.48/x
  3. Step 3: Cross multiply
    21,873.24x = 30,178.62 × 12,921.48
  4. Step 4: Simplify right side
    21,873.24x = 389,952,434.76
  5. Step 5: Solve for x
    x = 389,952,434.76/21,873.24
  6. Step 6: Final answer
    x = 17,827.83

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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.