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Finding the Fourth Proportional to 40,578.34, 60,874.47 and 12,497.86

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Solution

The fourth proportional to 40,578.34, 60,874.47 and 12,497.86 is: 18,748.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,578.34 : 60,874.47 = 12,497.86 : x
  2. Step 2: Convert to fraction form
    40,578.34/60,874.47 = 12,497.86/x
  3. Step 3: Cross multiply
    40,578.34x = 60,874.47 × 12,497.86
  4. Step 4: Simplify right side
    40,578.34x = 760,800,603.63
  5. Step 5: Solve for x
    x = 760,800,603.63/40,578.34
  6. Step 6: Final answer
    x = 18,748.93

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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.