Home / 28,138.86-42,187.32-9,407.82

Finding the Fourth Proportional to 28,138.86, 42,187.32 and 9,407.82

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Solution

The fourth proportional to 28,138.86, 42,187.32 and 9,407.82 is: 14,104.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.86 : 42,187.32 = 9,407.82 : x
  2. Step 2: Convert to fraction form
    28,138.86/42,187.32 = 9,407.82/x
  3. Step 3: Cross multiply
    28,138.86x = 42,187.32 × 9,407.82
  4. Step 4: Simplify right side
    28,138.86x = 396,890,712.84
  5. Step 5: Solve for x
    x = 396,890,712.84/28,138.86
  6. Step 6: Final answer
    x = 14,104.72

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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.