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Finding the Fourth Proportional to 40,989, 56,496.80 and 29,037

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Solution

The fourth proportional to 40,989, 56,496.80 and 29,037 is: 40,022.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,989 : 56,496.80 = 29,037 : x
  2. Step 2: Convert to fraction form
    40,989/56,496.80 = 29,037/x
  3. Step 3: Cross multiply
    40,989x = 56,496.80 × 29,037
  4. Step 4: Simplify right side
    40,989x = 1,640,497,581.60
  5. Step 5: Solve for x
    x = 1,640,497,581.60/40,989
  6. Step 6: Final answer
    x = 40,022.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.