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Finding the Fourth Proportional to 29,509.80, 40,738.29 and 18,765.48

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Solution

The fourth proportional to 29,509.80, 40,738.29 and 18,765.48 is: 25,905.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,509.80 : 40,738.29 = 18,765.48 : x
  2. Step 2: Convert to fraction form
    29,509.80/40,738.29 = 18,765.48/x
  3. Step 3: Cross multiply
    29,509.80x = 40,738.29 × 18,765.48
  4. Step 4: Simplify right side
    29,509.80x = 764,473,566.23
  5. Step 5: Solve for x
    x = 764,473,566.23/29,509.80
  6. Step 6: Final answer
    x = 25,905.75

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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.