Home / 71,519.88-107,285.08-18,929

Finding the Fourth Proportional to 71,519.88, 107,285.08 and 18,929

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Solution

The fourth proportional to 71,519.88, 107,285.08 and 18,929 is: 28,394.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,519.88 : 107,285.08 = 18,929 : x
  2. Step 2: Convert to fraction form
    71,519.88/107,285.08 = 18,929/x
  3. Step 3: Cross multiply
    71,519.88x = 107,285.08 × 18,929
  4. Step 4: Simplify right side
    71,519.88x = 2,030,799,279.32
  5. Step 5: Solve for x
    x = 2,030,799,279.32/71,519.88
  6. Step 6: Final answer
    x = 28,394.89

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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.