Home / 42,759.60-64,129.68-20,559.12

Finding the Fourth Proportional to 42,759.60, 64,129.68 and 20,559.12

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Solution

The fourth proportional to 42,759.60, 64,129.68 and 20,559.12 is: 30,834.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,759.60 : 64,129.68 = 20,559.12 : x
  2. Step 2: Convert to fraction form
    42,759.60/64,129.68 = 20,559.12/x
  3. Step 3: Cross multiply
    42,759.60x = 64,129.68 × 20,559.12
  4. Step 4: Simplify right side
    42,759.60x = 1,318,449,786.68
  5. Step 5: Solve for x
    x = 1,318,449,786.68/42,759.60
  6. Step 6: Final answer
    x = 30,834.01

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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.