Home / 28,229.50-42,360.65-12,647.12

Finding the Fourth Proportional to 28,229.50, 42,360.65 and 12,647.12

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Solution

The fourth proportional to 28,229.50, 42,360.65 and 12,647.12 is: 18,978.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,229.50 : 42,360.65 = 12,647.12 : x
  2. Step 2: Convert to fraction form
    28,229.50/42,360.65 = 12,647.12/x
  3. Step 3: Cross multiply
    28,229.50x = 42,360.65 × 12,647.12
  4. Step 4: Simplify right side
    28,229.50x = 535,740,361.35
  5. Step 5: Solve for x
    x = 535,740,361.35/28,229.50
  6. Step 6: Final answer
    x = 18,978.03

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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.