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Finding the Fourth Proportional to 30,356.60, 41,884.98 and 18,419.66

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Solution

The fourth proportional to 30,356.60, 41,884.98 and 18,419.66 is: 25,414.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,356.60 : 41,884.98 = 18,419.66 : x
  2. Step 2: Convert to fraction form
    30,356.60/41,884.98 = 18,419.66/x
  3. Step 3: Cross multiply
    30,356.60x = 41,884.98 × 18,419.66
  4. Step 4: Simplify right side
    30,356.60x = 771,507,090.71
  5. Step 5: Solve for x
    x = 771,507,090.71/30,356.60
  6. Step 6: Final answer
    x = 25,414.81

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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.