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Finding the Fourth Proportional to 31,990.02, 47,979.60 and 8,611.26

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Solution

The fourth proportional to 31,990.02, 47,979.60 and 8,611.26 is: 12,915.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,990.02 : 47,979.60 = 8,611.26 : x
  2. Step 2: Convert to fraction form
    31,990.02/47,979.60 = 8,611.26/x
  3. Step 3: Cross multiply
    31,990.02x = 47,979.60 × 8,611.26
  4. Step 4: Simplify right side
    31,990.02x = 413,164,810.30
  5. Step 5: Solve for x
    x = 413,164,810.30/31,990.02
  6. Step 6: Final answer
    x = 12,915.43

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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.