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Finding the Fourth Proportional to 28,915.20, 43,459.20 and 25,113.60

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Solution

The fourth proportional to 28,915.20, 43,459.20 and 25,113.60 is: 37,745.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,915.20 : 43,459.20 = 25,113.60 : x
  2. Step 2: Convert to fraction form
    28,915.20/43,459.20 = 25,113.60/x
  3. Step 3: Cross multiply
    28,915.20x = 43,459.20 × 25,113.60
  4. Step 4: Simplify right side
    28,915.20x = 1,091,416,965.12
  5. Step 5: Solve for x
    x = 1,091,416,965.12/28,915.20
  6. Step 6: Final answer
    x = 37,745.44

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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.