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Finding the Fourth Proportional to 40,388, 60,584.16 and 12,688.16

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Solution

The fourth proportional to 40,388, 60,584.16 and 12,688.16 is: 19,032.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,388 : 60,584.16 = 12,688.16 : x
  2. Step 2: Convert to fraction form
    40,388/60,584.16 = 12,688.16/x
  3. Step 3: Cross multiply
    40,388x = 60,584.16 × 12,688.16
  4. Step 4: Simplify right side
    40,388x = 768,701,515.55
  5. Step 5: Solve for x
    x = 768,701,515.55/40,388
  6. Step 6: Final answer
    x = 19,032.92

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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.