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Finding the Fourth Proportional to 40,392.68, 60,595.74 and 12,689

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Solution

The fourth proportional to 40,392.68, 60,595.74 and 12,689 is: 19,035.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,392.68 : 60,595.74 = 12,689 : x
  2. Step 2: Convert to fraction form
    40,392.68/60,595.74 = 12,689/x
  3. Step 3: Cross multiply
    40,392.68x = 60,595.74 × 12,689
  4. Step 4: Simplify right side
    40,392.68x = 768,899,344.86
  5. Step 5: Solve for x
    x = 768,899,344.86/40,392.68
  6. Step 6: Final answer
    x = 19,035.61

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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.