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Finding the Fourth Proportional to 29,605.44, 40,836.16 and 18,978.24

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Solution

The fourth proportional to 29,605.44, 40,836.16 and 18,978.24 is: 26,177.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,605.44 : 40,836.16 = 18,978.24 : x
  2. Step 2: Convert to fraction form
    29,605.44/40,836.16 = 18,978.24/x
  3. Step 3: Cross multiply
    29,605.44x = 40,836.16 × 18,978.24
  4. Step 4: Simplify right side
    29,605.44x = 774,998,445.16
  5. Step 5: Solve for x
    x = 774,998,445.16/29,605.44
  6. Step 6: Final answer
    x = 26,177.57

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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.