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Finding the Fourth Proportional to 29,645.88, 40,934.88 and 18,331.80

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Solution

The fourth proportional to 29,645.88, 40,934.88 and 18,331.80 is: 25,312.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,645.88 : 40,934.88 = 18,331.80 : x
  2. Step 2: Convert to fraction form
    29,645.88/40,934.88 = 18,331.80/x
  3. Step 3: Cross multiply
    29,645.88x = 40,934.88 × 18,331.80
  4. Step 4: Simplify right side
    29,645.88x = 750,410,033.18
  5. Step 5: Solve for x
    x = 750,410,033.18/29,645.88
  6. Step 6: Final answer
    x = 25,312.46

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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.