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Finding the Fourth Proportional to 48,426.78, 72,640.20 and 13,369.20

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Solution

The fourth proportional to 48,426.78, 72,640.20 and 13,369.20 is: 20,053.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,426.78 : 72,640.20 = 13,369.20 : x
  2. Step 2: Convert to fraction form
    48,426.78/72,640.20 = 13,369.20/x
  3. Step 3: Cross multiply
    48,426.78x = 72,640.20 × 13,369.20
  4. Step 4: Simplify right side
    48,426.78x = 971,141,361.84
  5. Step 5: Solve for x
    x = 971,141,361.84/48,426.78
  6. Step 6: Final answer
    x = 20,053.81

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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.