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Finding the Fourth Proportional to 11,957.17, 17,915.93 and 8,429.97

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Solution

The fourth proportional to 11,957.17, 17,915.93 and 8,429.97 is: 12,630.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,957.17 : 17,915.93 = 8,429.97 : x
  2. Step 2: Convert to fraction form
    11,957.17/17,915.93 = 8,429.97/x
  3. Step 3: Cross multiply
    11,957.17x = 17,915.93 × 8,429.97
  4. Step 4: Simplify right side
    11,957.17x = 151,030,856.49
  5. Step 5: Solve for x
    x = 151,030,856.49/11,957.17
  6. Step 6: Final answer
    x = 12,630.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.