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Finding the Fourth Proportional to 56,415.68, 84,630.72 and 18,959.68

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Solution

The fourth proportional to 56,415.68, 84,630.72 and 18,959.68 is: 28,441.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,415.68 : 84,630.72 = 18,959.68 : x
  2. Step 2: Convert to fraction form
    56,415.68/84,630.72 = 18,959.68/x
  3. Step 3: Cross multiply
    56,415.68x = 84,630.72 × 18,959.68
  4. Step 4: Simplify right side
    56,415.68x = 1,604,571,369.37
  5. Step 5: Solve for x
    x = 1,604,571,369.37/56,415.68
  6. Step 6: Final answer
    x = 28,441.94

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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.