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Finding the Fourth Proportional to 27,316.09, 40,978.56 and 13,276.91

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Solution

The fourth proportional to 27,316.09, 40,978.56 and 13,276.91 is: 19,917.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,316.09 : 40,978.56 = 13,276.91 : x
  2. Step 2: Convert to fraction form
    27,316.09/40,978.56 = 13,276.91/x
  3. Step 3: Cross multiply
    27,316.09x = 40,978.56 × 13,276.91
  4. Step 4: Simplify right side
    27,316.09x = 544,068,730.60
  5. Step 5: Solve for x
    x = 544,068,730.60/27,316.09
  6. Step 6: Final answer
    x = 19,917.52

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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.