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Finding the Fourth Proportional to 29,878.60, 44,915.10 and 21,173.80

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Solution

The fourth proportional to 29,878.60, 44,915.10 and 21,173.80 is: 31,829.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,878.60 : 44,915.10 = 21,173.80 : x
  2. Step 2: Convert to fraction form
    29,878.60/44,915.10 = 21,173.80/x
  3. Step 3: Cross multiply
    29,878.60x = 44,915.10 × 21,173.80
  4. Step 4: Simplify right side
    29,878.60x = 951,023,344.38
  5. Step 5: Solve for x
    x = 951,023,344.38/29,878.60
  6. Step 6: Final answer
    x = 31,829.58

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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.