Home / 28,112.64-42,167.52-8,391.36

Finding the Fourth Proportional to 28,112.64, 42,167.52 and 8,391.36

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Solution

The fourth proportional to 28,112.64, 42,167.52 and 8,391.36 is: 12,586.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,112.64 : 42,167.52 = 8,391.36 : x
  2. Step 2: Convert to fraction form
    28,112.64/42,167.52 = 8,391.36/x
  3. Step 3: Cross multiply
    28,112.64x = 42,167.52 × 8,391.36
  4. Step 4: Simplify right side
    28,112.64x = 353,842,840.63
  5. Step 5: Solve for x
    x = 353,842,840.63/28,112.64
  6. Step 6: Final answer
    x = 12,586.61

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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.