Home / 42,759.12-64,135.64-13,173.88

Finding the Fourth Proportional to 42,759.12, 64,135.64 and 13,173.88

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Solution

The fourth proportional to 42,759.12, 64,135.64 and 13,173.88 is: 19,759.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,759.12 : 64,135.64 = 13,173.88 : x
  2. Step 2: Convert to fraction form
    42,759.12/64,135.64 = 13,173.88/x
  3. Step 3: Cross multiply
    42,759.12x = 64,135.64 × 13,173.88
  4. Step 4: Simplify right side
    42,759.12x = 844,915,225.08
  5. Step 5: Solve for x
    x = 844,915,225.08/42,759.12
  6. Step 6: Final answer
    x = 19,759.88

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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.