Home / 13,260.78-18,299.66-7,955.69

Finding the Fourth Proportional to 13,260.78, 18,299.66 and 7,955.69

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Solution

The fourth proportional to 13,260.78, 18,299.66 and 7,955.69 is: 10,978.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,260.78 : 18,299.66 = 7,955.69 : x
  2. Step 2: Convert to fraction form
    13,260.78/18,299.66 = 7,955.69/x
  3. Step 3: Cross multiply
    13,260.78x = 18,299.66 × 7,955.69
  4. Step 4: Simplify right side
    13,260.78x = 145,586,290.79
  5. Step 5: Solve for x
    x = 145,586,290.79/13,260.78
  6. Step 6: Final answer
    x = 10,978.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.