Home / 28,915.10-43,388.85-12,272.30

Finding the Fourth Proportional to 28,915.10, 43,388.85 and 12,272.30

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Solution

The fourth proportional to 28,915.10, 43,388.85 and 12,272.30 is: 18,415.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,915.10 : 43,388.85 = 12,272.30 : x
  2. Step 2: Convert to fraction form
    28,915.10/43,388.85 = 12,272.30/x
  3. Step 3: Cross multiply
    28,915.10x = 43,388.85 × 12,272.30
  4. Step 4: Simplify right side
    28,915.10x = 532,480,983.86
  5. Step 5: Solve for x
    x = 532,480,983.86/28,915.10
  6. Step 6: Final answer
    x = 18,415.33

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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.