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Finding the Fourth Proportional to 56,409.72, 84,621.84 and 18,953.64

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Solution

The fourth proportional to 56,409.72, 84,621.84 and 18,953.64 is: 28,432.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,409.72 : 84,621.84 = 18,953.64 : x
  2. Step 2: Convert to fraction form
    56,409.72/84,621.84 = 18,953.64/x
  3. Step 3: Cross multiply
    56,409.72x = 84,621.84 × 18,953.64
  4. Step 4: Simplify right side
    56,409.72x = 1,603,891,891.50
  5. Step 5: Solve for x
    x = 1,603,891,891.50/56,409.72
  6. Step 6: Final answer
    x = 28,432.90

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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.