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Finding the Fourth Proportional to 15,790.84, 21,793.06 and 9,076.72

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Solution

The fourth proportional to 15,790.84, 21,793.06 and 9,076.72 is: 12,526.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.84 : 21,793.06 = 9,076.72 : x
  2. Step 2: Convert to fraction form
    15,790.84/21,793.06 = 9,076.72/x
  3. Step 3: Cross multiply
    15,790.84x = 21,793.06 × 9,076.72
  4. Step 4: Simplify right side
    15,790.84x = 197,809,503.56
  5. Step 5: Solve for x
    x = 197,809,503.56/15,790.84
  6. Step 6: Final answer
    x = 12,526.85

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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.