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Finding the Fourth Proportional to 31,557.60, 43,551.60 and 18,133.20

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Solution

The fourth proportional to 31,557.60, 43,551.60 and 18,133.20 is: 25,025.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,557.60 : 43,551.60 = 18,133.20 : x
  2. Step 2: Convert to fraction form
    31,557.60/43,551.60 = 18,133.20/x
  3. Step 3: Cross multiply
    31,557.60x = 43,551.60 × 18,133.20
  4. Step 4: Simplify right side
    31,557.60x = 789,729,873.12
  5. Step 5: Solve for x
    x = 789,729,873.12/31,557.60
  6. Step 6: Final answer
    x = 25,025.03

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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.