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Finding the Fourth Proportional to 12,637.62, 18,919.76 and 7,356.53

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Solution

The fourth proportional to 12,637.62, 18,919.76 and 7,356.53 is: 11,013.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,637.62 : 18,919.76 = 7,356.53 : x
  2. Step 2: Convert to fraction form
    12,637.62/18,919.76 = 7,356.53/x
  3. Step 3: Cross multiply
    12,637.62x = 18,919.76 × 7,356.53
  4. Step 4: Simplify right side
    12,637.62x = 139,183,792.55
  5. Step 5: Solve for x
    x = 139,183,792.55/12,637.62
  6. Step 6: Final answer
    x = 11,013.45

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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.