Home / 28,305.75-42,458.62-12,705.15

Finding the Fourth Proportional to 28,305.75, 42,458.62 and 12,705.15

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Solution

The fourth proportional to 28,305.75, 42,458.62 and 12,705.15 is: 19,057.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.75 : 42,458.62 = 12,705.15 : x
  2. Step 2: Convert to fraction form
    28,305.75/42,458.62 = 12,705.15/x
  3. Step 3: Cross multiply
    28,305.75x = 42,458.62 × 12,705.15
  4. Step 4: Simplify right side
    28,305.75x = 539,443,135.89
  5. Step 5: Solve for x
    x = 539,443,135.89/28,305.75
  6. Step 6: Final answer
    x = 19,057.72

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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.