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Finding the Fourth Proportional to 40,305.78, 60,429.78 and 18,946.53

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Solution

The fourth proportional to 40,305.78, 60,429.78 and 18,946.53 is: 28,406.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,305.78 : 60,429.78 = 18,946.53 : x
  2. Step 2: Convert to fraction form
    40,305.78/60,429.78 = 18,946.53/x
  3. Step 3: Cross multiply
    40,305.78x = 60,429.78 × 18,946.53
  4. Step 4: Simplify right side
    40,305.78x = 1,144,934,639.66
  5. Step 5: Solve for x
    x = 1,144,934,639.66/40,305.78
  6. Step 6: Final answer
    x = 28,406.21

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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.