Home / 42,782.60-64,146.57-20,551.75

Finding the Fourth Proportional to 42,782.60, 64,146.57 and 20,551.75

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Solution

The fourth proportional to 42,782.60, 64,146.57 and 20,551.75 is: 30,814.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,782.60 : 64,146.57 = 20,551.75 : x
  2. Step 2: Convert to fraction form
    42,782.60/64,146.57 = 20,551.75/x
  3. Step 3: Cross multiply
    42,782.60x = 64,146.57 × 20,551.75
  4. Step 4: Simplify right side
    42,782.60x = 1,318,324,032.56
  5. Step 5: Solve for x
    x = 1,318,324,032.56/42,782.60
  6. Step 6: Final answer
    x = 30,814.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.