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Finding the Fourth Proportional to 56,309.77, 84,405.81 and 18,839.02

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Solution

The fourth proportional to 56,309.77, 84,405.81 and 18,839.02 is: 28,238.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,309.77 : 84,405.81 = 18,839.02 : x
  2. Step 2: Convert to fraction form
    56,309.77/84,405.81 = 18,839.02/x
  3. Step 3: Cross multiply
    56,309.77x = 84,405.81 × 18,839.02
  4. Step 4: Simplify right side
    56,309.77x = 1,590,122,338.11
  5. Step 5: Solve for x
    x = 1,590,122,338.11/56,309.77
  6. Step 6: Final answer
    x = 28,238.84

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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.