Home / 71,518.87-107,283.57-18,928

Finding the Fourth Proportional to 71,518.87, 107,283.57 and 18,928

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Solution

The fourth proportional to 71,518.87, 107,283.57 and 18,928 is: 28,393.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,518.87 : 107,283.57 = 18,928 : x
  2. Step 2: Convert to fraction form
    71,518.87/107,283.57 = 18,928/x
  3. Step 3: Cross multiply
    71,518.87x = 107,283.57 × 18,928
  4. Step 4: Simplify right side
    71,518.87x = 2,030,663,412.96
  5. Step 5: Solve for x
    x = 2,030,663,412.96/71,518.87
  6. Step 6: Final answer
    x = 28,393.39

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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.