Home / 21,911.55-30,236.18-12,959.43

Finding the Fourth Proportional to 21,911.55, 30,236.18 and 12,959.43

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Solution

The fourth proportional to 21,911.55, 30,236.18 and 12,959.43 is: 17,882.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.55 : 30,236.18 = 12,959.43 : x
  2. Step 2: Convert to fraction form
    21,911.55/30,236.18 = 12,959.43/x
  3. Step 3: Cross multiply
    21,911.55x = 30,236.18 × 12,959.43
  4. Step 4: Simplify right side
    21,911.55x = 391,843,658.18
  5. Step 5: Solve for x
    x = 391,843,658.18/21,911.55
  6. Step 6: Final answer
    x = 17,882.97

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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.