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Finding the Fourth Proportional to 15,900.20, 21,941.17 and 8,826.06

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Solution

The fourth proportional to 15,900.20, 21,941.17 and 8,826.06 is: 12,179.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,900.20 : 21,941.17 = 8,826.06 : x
  2. Step 2: Convert to fraction form
    15,900.20/21,941.17 = 8,826.06/x
  3. Step 3: Cross multiply
    15,900.20x = 21,941.17 × 8,826.06
  4. Step 4: Simplify right side
    15,900.20x = 193,654,082.89
  5. Step 5: Solve for x
    x = 193,654,082.89/15,900.20
  6. Step 6: Final answer
    x = 12,179.35

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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.