Home / 12,040.64-18,043.68-7,928

Finding the Fourth Proportional to 12,040.64, 18,043.68 and 7,928

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Solution

The fourth proportional to 12,040.64, 18,043.68 and 7,928 is: 11,880.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,040.64 : 18,043.68 = 7,928 : x
  2. Step 2: Convert to fraction form
    12,040.64/18,043.68 = 7,928/x
  3. Step 3: Cross multiply
    12,040.64x = 18,043.68 × 7,928
  4. Step 4: Simplify right side
    12,040.64x = 143,050,295.04
  5. Step 5: Solve for x
    x = 143,050,295.04/12,040.64
  6. Step 6: Final answer
    x = 11,880.62

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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.