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Finding the Fourth Proportional to 28,978.32, 43,462.32 and 13,179.63

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Solution

The fourth proportional to 28,978.32, 43,462.32 and 13,179.63 is: 19,767.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.32 : 43,462.32 = 13,179.63 : x
  2. Step 2: Convert to fraction form
    28,978.32/43,462.32 = 13,179.63/x
  3. Step 3: Cross multiply
    28,978.32x = 43,462.32 × 13,179.63
  4. Step 4: Simplify right side
    28,978.32x = 572,817,296.54
  5. Step 5: Solve for x
    x = 572,817,296.54/28,978.32
  6. Step 6: Final answer
    x = 19,767.10

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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.