Home / 8,918.40-13,376.64-5,208.96

Finding the Fourth Proportional to 8,918.40, 13,376.64 and 5,208.96

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Solution

The fourth proportional to 8,918.40, 13,376.64 and 5,208.96 is: 7,812.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.40 : 13,376.64 = 5,208.96 : x
  2. Step 2: Convert to fraction form
    8,918.40/13,376.64 = 5,208.96/x
  3. Step 3: Cross multiply
    8,918.40x = 13,376.64 × 5,208.96
  4. Step 4: Simplify right side
    8,918.40x = 69,678,382.69
  5. Step 5: Solve for x
    x = 69,678,382.69/8,918.40
  6. Step 6: Final answer
    x = 7,812.88

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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.