Home / 21,898.34-30,219.70-11,826.78

Finding the Fourth Proportional to 21,898.34, 30,219.70 and 11,826.78

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Solution

The fourth proportional to 21,898.34, 30,219.70 and 11,826.78 is: 16,320.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,898.34 : 30,219.70 = 11,826.78 : x
  2. Step 2: Convert to fraction form
    21,898.34/30,219.70 = 11,826.78/x
  3. Step 3: Cross multiply
    21,898.34x = 30,219.70 × 11,826.78
  4. Step 4: Simplify right side
    21,898.34x = 357,401,622.85
  5. Step 5: Solve for x
    x = 357,401,622.85/21,898.34
  6. Step 6: Final answer
    x = 16,320.95

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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.