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Finding the Fourth Proportional to 56,409.76, 84,618.89 and 18,969.94

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Solution

The fourth proportional to 56,409.76, 84,618.89 and 18,969.94 is: 28,456.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,409.76 : 84,618.89 = 18,969.94 : x
  2. Step 2: Convert to fraction form
    56,409.76/84,618.89 = 18,969.94/x
  3. Step 3: Cross multiply
    56,409.76x = 84,618.89 × 18,969.94
  4. Step 4: Simplify right side
    56,409.76x = 1,605,214,748.22
  5. Step 5: Solve for x
    x = 1,605,214,748.22/56,409.76
  6. Step 6: Final answer
    x = 28,456.33

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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.