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Finding the Fourth Proportional to 29,551.36, 40,780.88 and 18,940.99

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Solution

The fourth proportional to 29,551.36, 40,780.88 and 18,940.99 is: 26,138.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,551.36 : 40,780.88 = 18,940.99 : x
  2. Step 2: Convert to fraction form
    29,551.36/40,780.88 = 18,940.99/x
  3. Step 3: Cross multiply
    29,551.36x = 40,780.88 × 18,940.99
  4. Step 4: Simplify right side
    29,551.36x = 772,430,240.27
  5. Step 5: Solve for x
    x = 772,430,240.27/29,551.36
  6. Step 6: Final answer
    x = 26,138.57

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1.5x scale

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.