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Finding the Fourth Proportional to 27,181.68, 40,779.81 and 21,655.86

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Solution

The fourth proportional to 27,181.68, 40,779.81 and 21,655.86 is: 32,489.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,181.68 : 40,779.81 = 21,655.86 : x
  2. Step 2: Convert to fraction form
    27,181.68/40,779.81 = 21,655.86/x
  3. Step 3: Cross multiply
    27,181.68x = 40,779.81 × 21,655.86
  4. Step 4: Simplify right side
    27,181.68x = 883,121,856.19
  5. Step 5: Solve for x
    x = 883,121,856.19/27,181.68
  6. Step 6: Final answer
    x = 32,489.60

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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.