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Finding the Fourth Proportional to 28,025.64, 41,978.16 and 13,212.36

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Solution

The fourth proportional to 28,025.64, 41,978.16 and 13,212.36 is: 19,790.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,025.64 : 41,978.16 = 13,212.36 : x
  2. Step 2: Convert to fraction form
    28,025.64/41,978.16 = 13,212.36/x
  3. Step 3: Cross multiply
    28,025.64x = 41,978.16 × 13,212.36
  4. Step 4: Simplify right side
    28,025.64x = 554,630,562.06
  5. Step 5: Solve for x
    x = 554,630,562.06/28,025.64
  6. Step 6: Final answer
    x = 19,790.11

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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.